If S6=737.856 and r=4/5 what is the value of a1?

Answer 1

a(1-r^n)/(1-r) = S;

in this case, n = 6 and r = 4/5

Then, a = S6(1-(4/5))/(1-(4/5)^6) = 737.856(.2)/(1-.262144) = 737.856(.2)/.737856 = 200