Question

First, second and fourth terms of a proportion are 5.6, 4.2 and 4. Find its third term.​

Answer 1

Step-by-step explanation:

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Answer 2

a=5.6 , a2=4.2 , a4=4

d=a2-a

d=4.2-5.6=-1.4

so a3=a+2d

a3=5.6+2(-1.4)

a3=5.6-2.8

so a3,=2.8