Question

Find the fourth proportion of 5,6 and 7 correct to two places of decimal.

Answer 1

5:6::7:x
5x=42
x=42/5=8.4

Answer 2

Answer:

Step-by-step explanation:

Let the fourth proportional be x.

By cross-multiplication method,

5*x = 6*7

5x = 42

x = 42/5

x = 8.40

Therefore, 5 : 6 :: 7 : 8.40