Proportion Word Problems

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the two ratios and set the products equal to each other.

Front

What does it mean when a map scale is 1 inch to 10 miles?

Back

It means that every 1 inch on the map represents 10 miles in real life.

Front

If a map shows a distance of 3.5 inches, how do you find the real-life distance using a scale of 1 inch to 10 miles?

Back

Multiply 3.5 inches by 10 miles/inch to get 35 miles.

Front

What is the formula to find the total amount needed for a recipe if you want to double it?

Back

Multiply each ingredient amount by 2.

Front

If a recipe requires 2 cups of lemon juice for 16 cups of lemonade, how much lemon juice is needed for 32 cups?

Back

4 cups of lemon juice.

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity per 1 unit.

Front

How do you find the distance traveled if you know the speed and time?

Back

Use the formula: Distance = Speed × Time.

Front

If a car travels 480 miles in 8 hours, what is its speed?

Back

Speed = Distance ÷ Time = 480 miles ÷ 8 hours = 60 miles per hour.

Front

If a machine produces 200 widgets in 5 hours, how many widgets does it produce in 1 hour?

Back

40 widgets per hour.