G.A.

Wednesday 10/7 Practice

Using Ratio Proportions to solve for Scaled Drawings with different units

Steps for Writing A Proportion Using Scale Factor

• Set up the problem with the given ratio between the 2 different units to equal the new proportion (including the distance given in the problem.

• Cross out the unit names that are repeated & keep the unit byitself.

• Cross multiply with the diagonal given numbers

• Divide with the number in the diagonal by itself.

Multiple Choice

Solve for x 

• x = 16
• x = 28
• x = 1/26
• x = 26

Multiple Choice

Whittemore Park Middle School is 30 feet tall. A 5 inch tall scale model of the school was made by the art club. What is the scale of the model?

• one inch = 6 feet

• one inch = 6 inches

• one inch = 72 inches

Multiple Choice

What is a scale drawing?

• A drawing that shows a real object enlarged or reduced
• A drawing of the weight of an object
• A life size drawing of an object
• A drawing that shows all the sides of a building

Multiple Choice

Robbie made a scale drawing of a neighborhood park. A soccer field in the park is 14 inches long in the drawing. The actual field is 98 yards long. What is the scale of the drawing?1 inch = _ yards

• 1372
• 5
• 14
• 7

Multiple Choice

On a map, Memphis, Tennessee, and Jackson, Mississippi, are 5 inches apart. The distance between the cities is actually 210 miles.

What scale was used to create the map?

• 42 inches = 1 mile
• 1 inch = 42 miles
• 40 inches = 1 mile
• 
  1 inch = 40 miles

Multiple Choice

From Denver to Chicago = 3 in. If the scale is 1 in = 300 miles, find the actual distance.

• 300 miles
• 1000 miles
• 900 miles
• 600 miles

Multiple Choice

Scale is 1cm = 8km. Hatboro and Smithville are 24cm apart on the map, what is the actual distance between the 2 cities?

• 87 km
• 216 km 
• 33 km
• 192 km

Multiple Choice

The scale drawing car length is 3 cm. If the scale is 1 cm:4 ft, what is the actual car length?

• 12 feet
• 16 feet 
• 10 feet
• 4 feet

Using Proportions to find scale factor

• Write ratio that compares the two amounts

• Compare the quantities using the same units.

• Simplify to get the scaled factor

Multiple Choice

A scale drawing that measures 8 units wide and an original that measures 4 units wide has a scale factor of...

• 2:1
• 8:1
• bigger
• 1:2

Multiple Choice

Robbie made a scale drawing of a neighborhood park. A soccer field in the park is 14 inches long in the drawing. The actual field is 98 yards long. What is the scale of the drawing?1 inch = _ yards

• 1372

• 5

• 7

• 14