A fruit seller sells only mangoes and pomegranates. The ratio of mangoes to pomegranates is 4 : 5. A total of 247 fruits are added. The number of mangoes becomes 2 times as many as before and the number of pomegranates becomes 4 times as many as before. How many fruits are there in the end?

	Comparing mangoes at first and in the end	Mangoes	Pomegranates	Comparing pomegranates at first and in the end
Before	1x4 = 4 u	4 u	5 u	1x5 = 5 u
Change		+ 247
After	2x4 = 8 u	8 u	20 u	4x5 = 20 u

The number of pomegranates at first is repeated.  Make the number of pomegranates at first the same.  LCM of 1 and 5 is 5.

The number of mangoes at first is repeated. Make the number of mangoes at first the same. LCM of 1 and 4 is 4.

Number of fruits at first
= 4 u + 5 u
= 9 u

Number of fruits in the end
= 8 u + 20 u
= 28 u

Number of fruits added
= 28 u - 9 u 
= 19 u

19 u = 247

1 u = 247 ÷ 19 = 13

Number of fruits in the end
= 28 u
= 28 x 13
= 364

Answer(s): 364