1. Lesson 4-2 Solving Proportions
Page 163

2. #1) Are the ratios proportional?
Cross multiply.
144 =
144
YES

3. #2) Are the ratios proportional?
Cross multiply. 54 = 54
YES

4. NO. The cross products are not equal.
#5) A bubble solution can be made with a ratio of 1 part detergent to 8 parts water. Would a mixture of 56 oz water and 8 oz detergent represent the same ratio? Explain.
𝑑𝑒𝑡𝑒𝑟𝑔𝑒𝑛𝑡 𝑤𝑎𝑡𝑒𝑟 56 ≠ 64
NO. The cross products are not equal.

5. #6) The ratio of an object’s weight on Earth to its weight on the Moon is 6:1. The first person to walk on the Moon was Neil Armstrong. He weighed 165 pounds on Earth. How much did he weigh on the Moon?
𝐸𝑎𝑟𝑡ℎ 𝑀𝑜𝑜𝑛 𝑥 6𝑥 =
165
𝑥=27.5 𝑝𝑜𝑢𝑛𝑑𝑠

6. #7) A school bus travels 7 miles in 20 minutes
#7) A school bus travels 7 miles in 20 minutes. At this rate, how long will it take the school bus to complete its entire 45.5-mile route?
𝑚𝑖𝑙𝑒𝑠 𝑚𝑖𝑛𝑢𝑡𝑒𝑠 𝑥 7𝑥 =
910
𝑥=130 𝑚𝑖𝑛𝑢𝑡𝑒𝑠

7. #8) Ana is using a photocopier to make 315 copies of a poster
#8) Ana is using a photocopier to make 315 copies of a poster. It takes 3 minutes to print the first 63 posters. If the photocopier continues to print at the same rate, how many more minutes will it take to complete the job?
𝑚𝑖𝑛𝑢𝑡𝑒𝑠 𝑝𝑜𝑠𝑡𝑒𝑟𝑠
𝑥 252
756 =
63𝑥
12=𝑥
12 minutes