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 is the formula for finding a missing value in a proportion?

Back

If a/b = c/d, then ad = bc.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, often expressed as a fraction.

Front

How can you express a ratio in simplest form?

Back

To express a ratio in simplest form, divide both terms by their greatest common divisor.

Front

What is a unit rate?

Back

A unit rate is a ratio that compares a quantity to one unit of another quantity.

Front

How do you find a unit rate?

Back

To find a unit rate, divide the first quantity by the second quantity.

Front

If a car travels 60 miles in 1 hour, what is its speed in miles per minute?

Back

1 mile per minute.

Front

If 3 apples cost $1.50, what is the cost of 1 apple?

Back

$0.50 per apple.

Front

What is the relationship between ratios and proportions?

Back

Ratios are used to create proportions, which show that two ratios are equivalent.