Question

The last three terms of a proportion are 7,18 and 42. Find the first term.​

Answer 1

Answer:

answer:

Step-by-step explanation:

let one the third term will be x

so

first term =3

second term=7

fourt term =42

By the question

first term second term third term fourth term

3:7::x:42

As,

product of extremes =product of means

3x42=7xx

3x42/7=x

3x6=x

18 =x