Proportions or ratios are fundamental concepts of mathematics. A proportions is an equation that states that two ratios are equal. Hence proportion can be written in two ways as a:b=c:d or a/b=c/d. In these equations a and d are called as extremes and b,c are called as means. So when working with proportions we can state that product of the means is equal to the product of the extremes i.e. a*d = b*c. This is obtained by cross multiplying the second form of proportions. In mathematics you are...
To solve a proportion for a variable you should employ cross multiplication. The basis of cross multiplication is the property which states that the product of the numerator of one fraction and the denominator of what it is set equal to is equal to the product of the remaining denominator and numerator. For example if you have x/15=21/45 you simply need to multiply x by 45 and 15 by 21 then set them equal to each other. The result of this is 45x=315. To solve this new problem for x, divide bo...
A percent problem is one in which you are given a quantity and asked to compute the value of a percent of it. You may also be given the whole quantity and a part of it and asked to compute the percentage of the part in the whole. To do these kind of problems you need to use the rule which states that the ratio of the part to the base it equal to the ratio of the percent to hundred. That is part/base = percent/100. This comes from the definition of percentage which states that percentage is eq...
In this video they are showing how to use proportions to solve word problems. In the first example they used 2/3 is equal to x/6. To solve for x, you begin by cross multiplying setting up and equation 3x=12. Next, divide 12 by 3 which equals 4. So x equals 4. In the next example, she has given a situation where she is making a ranch dip using a ranch powder and sour cream. She want to use 80oz of sour cream and she wants to know how much powder ranch she will need. She know that for 16oz of s...
From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to calculate unknowns in proportions in algebra.
This video walks you through the steps of solving a ration and proportion problems. This excellent video shows you a clean blackboard, with the instructors voice showing exactly what to do. Don't fret, any question you may have, will be answered. Watching this video will make you feel like your back in the classroom but rather comfortably from your home.
You can solve any proportion using the fundamental rule of proportions. First you must build the proportion if you are given a word problem. Decide using logic whether it is a direct proportion (more on one side means more on the other). If so, find the parts of the equation that use the same units and make a fraction with these, putting the smaller number on top. The number left over is linked with one of the other two numbers in the fraction--use logic to figure out which. Put it in the sam...
This video tutorial shows how to solve inverse proportions. The tutor says that in inverse proportion it works differently than in the direct proportion. He says that in inverse proportion more means less or less means more. He uses the example of driving a car to illustrate his idea. He says that if you drive a car with more speed, you take less time to reach a place i.e. here more speed means less time. He goes on and solves a problem involving inverse proportion explaining how to solve the...
From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just study for that next big test). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to find a 95% confidence interval in statistics.
This video describes how to solve direct proportions in algebra which is an important and useful skill in everyday life, school and at work. In this video one would learn key elements of a direct proportion and learn to separate them into a more means more or less means less types of proportion. For example if one had a direct proportion of the more means more type one would simply gather the logical numbers and follow the two simple rules for solving. Overall this video is simple and useful ...
From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to solve pop. proportion problems in stats.
Learn how to do large-sample-proportion hypothesis testing in stats! From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. For all of the details, watch this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials.
One of the hardest things in figure drawing to master is proportion, but in this video Sheldon shows you how to the draw a figure proportionally. Using the head size as unit of measure, Sheldon will teach how many heads there are in a human figure drawing, a cartoon figure drawing and even in a super hero drawing. After watching this video you will have a firm grasp on the skills needed to draw a figure proportionally every time you put pencil to paper.
"Miki Falls" manga creator Mark Crilley presents a tutorial with tips on how to render a male body in proper proportion to the head. Learn how to sketch for anime or manga by watching this video drawing tutorial.
This is a video tutorial in the Education category where you are going to learn how to master inverse proportions in Algebra. Inverse proportions have a different rule; more means less or less means more. Let us understand this with an example. It took 175 minutes to drive to the cottage at 80 kmph. If we drive at 100 kmph instead, how long will it take? Here the speed of travel is more but the time taken to complete the journey will be less. So, this is a more means less kind of inverse prop...
This is a demonstration of how to check rice proportions with our finger where you want to make rice without using a measuring pot.
What Are Proportions? Proportions are 2 ratios that are equal.
In this how to you will learn about proportions. A proportion is comparing two ratios. Here is an example of a problem. First, you cross multiply and show your work. Next, you simplify. After, in order to get the variable alone, you divide each side by four. Since you can't divide 21 by eight without a decimal so your answer is 21/8.
The Solution The first step to solving proportions is cross multiplying. For example, we are told to solve the proportion 13/3 = x/9. We cross multiply 13 •9 and 3 • x. Remember, the equal sign does not go away, so don't forget about it! The equation is now 3x = 117. We need to isolate the variable so we do 3x ÷ 3, which is x, and 117 ÷ 3, which equals 39. We now know that x = 39. Practice Time
In this math lesson we will learn how to solve a proportion word problem. Watch the video to learn how to set up a proportion, solve it, and interpret the answer.
Need to know how to use your Texas Instruments graphing calculator for your college math or statistics class? You're in luck... watch this video tutorial to see how to proportion population with a TI-83 graphing calculator.
Look for a vertical or horizontal relationship in the given equation. In the horizontal or vertical side of the equation where both numerator and denominators are given, look for a multiplier to the smaller number so that the product is equal to the bigger number. Use this multiplier to multiply it with the smaller number on the other side of the equation and you will get the value of "x".
Images taken from http://www.ppugartist.com - Paul Pugliese Art & Design
Portrait drawings are difficult for most artists, but one thing's for sure— drawing nerds is as easy as they come. Nerds are easier to draw because you can stray from the formality of portraits, putting your own spin on it, over-compensating the details, exaggerating the dorky features. It's a drawing class in its own, and Merrill shows you how to draw his version of the NERD!
In this how to video, you will learn how to draw an angel. First, start out with the basic sketch of the drawing. Remember, eyes go in the middle of the head. Drawing the head first will help proportion the rest of the body. Use long strokes with the wrist to draw the hair. Try to make the hands the size of the face and try to make the fingers look like fish sticks. It is easier to draw if you study anatomy books. Next, erase the sketch and start going in with further detail. Exaggerate the w...
Draw any face in side view completely from memory! This tutorial teaches you several proportion tricks, such as how to space the ears and eyes relative to each other or the shape of the head, when you're trying to draw someone in profile.
Using motion capture is one of the easiest and most effective ways to animate the motions of a bipedal character who is proportional to a normal human. When the character is not in proportion, like the World of Warcraft low-poly models in this video, it gets a little more complicated. This video will teach you how to use motion capture in 3DS MAX to animate a goblin WoW character, making them almost ready to use in your hybrid machinima videos.
New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 598th installment in their series of digital spreadsheet magic tricks, you'll learn how to create a formula to calculate hours worked given an in time, an out time and an in and out time for the lunch break. Learn about how time in Excel is the proportion of one 24 hour day.
Consider a normal and ideal height for a girl in 5feet 8inches in height. The book of Andrew Loomis is a good guide for drawing realistic human figures. It explains the body proportions, techniques, drawing the parts, human movements, and poses of the body.
First you need to do is to open up the HD video file of Canon HV20 and then you can set the project properties. So go to file, import, media and open up the video file. Now drag it to the timeline and go to file, properties, click on the file folder called "match media settings" and open the same video file which you just opened. Now click on apply and then ok. But now video proportion is not fine. To fix it go to option, preferences, click on video tab and check the box which says "simulate ...
Simon Leach teaches us how to put handles on your ceramics in this tutorial. The key thing is to never let the handle fall as you are adding it to a cup, always keep it supported. Look at the handle as you are placing it on and think about proportion and size. If it's sticking out too far it's going to get knocked off. You need to have an elliptical shaped handle when you are shaping them so they can be gripped properly. Don't score the bottom part when you are joining the handle to the botto...
This video shows us the method to draw a fashion concept sketch. You must show the figure of the person you are drawing. You can draw the figure wearing a scarf you have designed. You can draw the flowers on it. A lot of sketches are very long. There are a lot of vertical lines and plates in the sketch. There are long legs at the bottom of the sketch. The parts of the body are not in human proportion. You can draw bracelets and a purse in the sketch. The sketch would be finished with color, v...
In this tutorial the author shows how to find out the missing part of a triangle that is similar to another triangle. He explains the concept of similar triangle diagrammatically by showing that similar triangles have similar angles and parallel sides. Now he labels sides of similar triangles and marks the value of unknown side as variable x. Now in similar triangles as the lengths of sides of proportionate he shows how to write a equation of proportion and solves it finding the missing part ...
Do your kids blow every problem way out of proportion? Do they need to develop some self-control? Watch this video to learn how you can teach you kids to manage their emotions and put their problems into perspective with discipline and teaching by example.
If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's ExcelsFun, the 93rd installment in his "Excel Statistics" series of free video lessons, you'll learn how to use the NORMSINV and NORMSDIST functions to complete a hypothesis test about a population proportion.
To draw people, proportion is important to maintain a realistic appearance, as well as anatomical details. Draw the basic human form with tips from a professional illustrator in this free instructional video on drawing. Figure or anatomy drawing is an important first step in becoming accomplished at drawing.
Percent problems, also called as proportion problems, are simple problems where you deal with percentages. Given a percentage problem you may need to identify the percentage, the part or whole quantity from it. You can use the proportion or percent equation to do this. Proportion equations says that the ratio of part to the whole is equal to the ratio of percentage to one hundred. Percent equation says that the product of the percentage in the decimal form and the whole gives you the quantity...
In this tutorial, we learn how to choose the right pair of jeans. The high waisted skinny jean only works on a tall and very thin girl. A nice fitted jacket will help proportion your entire body. A boot cut will flare out and the knee and help you appear thinner. If you have extra weight on your legs, avoid stressing that lightens the area. Also, avoid any embroidery, which will add weight to yourself. A straight leg will also look great on girls with girls with more weight on their legs. A h...
In this Home & Garden video tutorial you will learn how to make a concrete counter top mold. Fu Tung Cheng from Concrete Network presents this video. For making different edges on your counter top, a compound called polyurethane is used for making the mold. It is a two part compound mixed together to form a rubbery substance. While using polyurethane follow the manufacturer’s recommended dosage, time, proportion and also use the recommended release agent. Take a piece of the molding wood and ...
TVLessonDotCom teaches you how to draw a person's face from the front. Start with a basic oval shape. You can do this part in pencil and then erase it. Use a vertical cross line and a horizontal one. Add two more horizontal ones to break the face into sections: hairline, eyes, nose and mouth and then chin. The eyes are small oval shapes. You can also create a small circle in the middle and then eyebrows. Draw the nose next and then add the mouth. Everything must be in proportion, so the verti...
