Proportions Word Problems Review

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal. For example, if a/b = c/d, then a, b, c, and d are in proportion.

Front

How do you set up a proportion for a word problem?

Back

Front

What is the cross-multiplication method?

Back

Front

How do you find the missing value in a proportion?

Back

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together. It is often expressed as a quantity per one unit, such as miles per hour or cost per item.

Front

How do you calculate a unit rate?

Back

Front

What is the scale in a map?

Back

The scale of a map is the ratio of a distance on the map to the actual distance on the ground. For example, a scale of 1 cm : 13 miles means that 1 cm on the map represents 13 miles in reality.

Front

How do you use a scale to find actual distances?

Back

Front

What is a ratio?

Back

Front

How do you solve a word problem involving ratios?

Back

Identify the quantities involved, express them as a ratio, and set up an equation based on the problem. Then solve for the unknown quantity.