Question

first second and fourth terms of a proportion are respectively 5.2 , 3.9 and 3. find its third term ​

Answer 1

t1=5.2 , t2=3.9 , t3=? , t4=3

t2-t1=3.9-5.2=1.3

d=1.3 , a=5.2

t3=t2+d=3.9+1.3=5.2