# How to solve ratio and proportion

## Proportions Ratios Introduction - what are ratios?

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Let's talk about ratios and proportions. When we talk about the speed of a car or an airplane we measure it in miles per hour. This is called a rate and is a type of ratio. A ratio is a way to compare two quantities by using division as in miles per hour where we compare miles and hours. A proportion on the other hand is an equation that says that two ratios are equivalent.

Solving proportions is simply a matter of stating the ratios as fractions, setting the two fractions equal to each other, cross-multiplying , and solving the resulting equation. The exercise set will probably start out by asking for the solutions to straightforward simple proportions, but they might use the "odds" notation, something like this:. Okay; they've given me to ratios, in "odds" notation, and set them equal. This creates a proportion:. Solving Proportions. My first step will be to convert the colon-based odds-notation ratios to fractional form, so I get an equation with two fractions:.

Let's talk about ratios and proportions. When we talk about the speed of a car or an airplane we measure it in miles per hour. This is called a rate and is a type of.
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Proportion says that two ratios or fractions are equal. Multiply across the known corners, then divide by the third number. This time the known corners are top left and bottom right:. Sam tried using a ladder, tape measure, ropes and various other things, but still couldn't work out how tall the tree was. Sam measures a stick and its shadow in meters , and also the shadow of the tree, and this is what he gets:.

If you're seeing this message, it means we're having trouble loading external resources on our website. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. Skill Summary Legend Opens a modal. Intro to ratios. Intro to ratios Opens a modal. Ratio review Opens a modal. Basic ratios Opens a modal.

## Proportions: Simple Exercises

A proportion is simply a statement that two ratios are equal. The following proportion is read as "twenty is to twenty-five as four is to five.,

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## Ratios, rates, proportions

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1. Russplatpartmous1959 says:

Ratios and proportions are closely linked to each other as concepts.

2. David B. says:

Ratios and Proportions - Proportions - In Depth

3. Afrodita M. says:

Ratio and Proportion shortcut tricks are very important thing to know for your exams.

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