What should come in place of the question mark '?' in the following number series?
5, 7.5, 15, 37.5, 112.5, ?1
375.75
2
393.75
3
413.25
4
447.35
5
237.75
What should come in place of the question mark '?' in the following number series?
5, 7.5, 15, 37.5, 112.5, ?