Question

7. Find the third proportion to 4.2,0.7.​

Answer 1

Answer:

Answer is 0.1

Step-by-step explanation:

Let the third proportion to 4.2 and 0.7 be x

then 4.2,0.7 and x are in continued proportion since b^2=ac

So, 4.2/0.7=0.7/x

x=0.1

Hence the third proportion is 0.1

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Answer 2

Answer:

the method he told you is wrong

Step-by-step explanation:

4.2,0.7 are continued proportion

so,4.2:0.7::0.7:x

product of extremes =product of means

so, 4.2x = 0.7 x 0.7

x = 0.7 x 0.7 / 4.2 => 7 x 7 /42

= x =  7/6

hope it helps