Here we will use the following formula:
FV = PV * (1 + r%)n
where, FV = Future value = $2987500, PV = Present value = $2234500, r = rate of interest or increase, n= time period = 7
now, putting theses values in the above equation, we get,
$2987500 = $2234500 * (1 + r)7
$2987500 / $2234500 = (1 + r)7
1.336988140523 = (1 + r)7
(1.336988140523)1/7 = 1 + r
1.04236 = 1 + r
r = 1.0423611 - 1
r = 0.0423611 or 4.236%
So, straight line annual rate of increase is 4.236%
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