Proportions Review - PM Classes

Front

What is a proportion?

Back

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

Front

How do you determine if two ratios form a proportion?

Back

Two ratios form a proportion if the cross products are equal.

Front

What is the cross product of the ratios a/b and c/d?

Back

The cross product is ad and bc. If ad = bc, then a/b = c/d is a proportion.

Front

If 2/3 = x/9, what is the value of x?

Back

x = 6.

Front

Ramon travels 20 miles in 20 minutes. How many miles can he travel in 120 minutes?

Back

120 miles.

Front

If 5/8 = x/32, what is the value of x?

Back

x = 20.

Front

What is the formula to find the unit rate?

Back

The unit rate is found by dividing the numerator by the denominator.

Front

At a party, it costs $9.50 for 10 guests. What is the cost per guest?

Back

The cost per guest is $0.95.

Front

If 3/4 of a pizza is left and you want to share it with 3 friends, how much does each person get?

Back

Each person gets 1/4 of the pizza.

Front

What is the relationship between ratios and proportions?

Back

Ratios compare two quantities, while proportions show that two ratios are equal.