Question

find the fourth proportional to 5,7 and 30​

Answer 1

Answer:

ANSWER

Let the fourth number be x

Then

=5:7::30:x

We know that

product of extremes = product of means

∴ 5×x=7×30

5x=210

x=210/5

x=42

Hence, x=42

Answer 2

Answer:

fouth proportions you find x and after

7x=30×5

7x=150

x=21.42