Joelle and Esther have $318. Ivory and Joelle have $378. The ratio of Esther to Ivory is 1 : 4. How much does Joelle have?
Amount that Esther has = 1 u
Amount that Ivory has = 4 u
The amount that Joelle has is the repeated identity.
Joelle + 1 u = 318 --- (1)
Joelle + 4 u = 378 --- (2)
(2) - (1)
4 u - 1 u = 378 - 318
3 u = 60
1 u = 60 ÷ 3 = 20
From (1):
Joelle + 1 u = 318
Joelle + 1 x 20 = 318
Joelle + 20 = 318
Amount that Joelle has
= 318 - 20
= $298
Answer(s): $298
