Proportions

What is a ratio?

What are the three ways to write a ratio?

Using the simplifying method, tell whether the ratios form a proportion.

 $\frac{3}{12}\ ,\ \frac{2}{8}$  

Using the simplifying method, tell whether the ratios form a proportion.

 $\frac{21}{28}\ ,\ \frac{75}{100}$  

Using the simplifying method, tell whether the ratios form a proportion.

 $\frac{5}{10}\ ,\ \frac{3}{8}$  

Do you understand how the SIMPLIFYING METHOD works? 😮

Using the cross product method, tell whether the ratios form a proportion.

 $\frac{8}{3}\ ,\ \frac{5}{2}$  

Using the cross product method, tell whether the ratios form a proportion.

 $\frac{6}{9}\ ,\ \frac{5}{7}$  

Using the cross product method, tell whether the ratios form a proportion.

 $\frac{6}{4}\ ,\ \frac{9}{6}$  

Do you understand how the 'CROSS PRODUCT' method works? 😮

Solve the proportion using cross product.

  $\frac{y}{4}=\frac{4}{8}\ \$  

Solve the proportion using cross product.

  $\frac{7}{12}=\frac{21}{a}\ \$  

Solve the proportion using cross product.

  $\frac{4}{5}=\frac{m}{25}\ \$  

Solve the proportion using cross product.

  $\frac{3}{v}=\frac{18}{42}\ \$  

The speed limit on Guam is 35 miles per hour.

You drive a total of 5 hours from Yigo to Merizo and back.

How many miles did the trip take?

A small plane is traveling at a rate of 40 meters for every 2 seconds. How many meters will the plane travel in 20 seconds?

For every dollar Ms. Cruz spends at Ross, she earns two customer points in her Ross card. If Ms. Cruz spends $225 at Ross, how many customer points will she earn in her card?