Question

find the ratio of third proportinal to 12 and 30 and the mean proportion between 9 and 25

Answer 1

Answer:

Step-by-step explanation:

third proportion in 12 : 30 is 75

the mean proportion between 9 and 25 is

9 : x : : x : 25 ==> x = 15

therefore , ratio = 75 : 15 ==> 5 : 1