Question

find the four proposonal to1.4,
7,3.5​

Answer 1

Answer:

17.5

Step-by-step explanation:

Let the forth poroportional be x.

Then, = 1.4 : 7 :: 3.5 : x

         =1.4*x = 3.5*7                       (Product of means = Product of extremes)

         = 1.4x = 24.5

         =  x     =  24.5/1.4 = 245/14 = 35/2 = 17.5 Ans.