Saturday

April 19, 2014

April 19, 2014

Posted by **John Berkhamp** on Tuesday, July 23, 2013 at 1:29pm.

- Algebra/Number Theory -
**Steve**, Tuesday, July 23, 2013 at 2:00pmThe numbers are

12, 12+d, 12+2d, 452

12, 12+d, (12+d)r, (12+d)r^2=452

(12+d)r^2 = 452

12+2d = (12+d)r

so,

r = (12+2d)/(12+d)

(12+d)((12+2d)/(12+d))^2 = 452

(12+2d)^2 = 452(12+d)

d = 112.71

r = 1.09377

The numbers are

12, 124.71, 237.42, 452

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