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A proportion occurs when two ratios are forced to be equal to each other. This selection will allow you to
find a second ratio that is in the same proportion as the first.
Since a ratio is made up of two numbers, and a proportion compares - The first ratio will be between the two numbers represented by a and b. As a ratio, it will be
**a to b**, or**a:b**. You can choose numbers for a and b below. - The second ratio will be between the two numbers represented by c and d. As a ratio, it will be
**c to d**, or**c:d**. You can choose numbers for c and d below.
The proportion below can be stated as: "a is to b as c is to d." This can also be written as |

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