The jar of yellow and green marbles has a ratio of 4 to 3, so:
[tex]4\colon3=\frac{4}{3}[/tex]this tells us that for every 4 yellow marbles, there are 3 green marbles
so:
[tex]\begin{gathered} \frac{320}{x}=\frac{4}{3} \\ where \\ x=Number_{\text{ }}of_{\text{ }}green_{\text{ }}marbles \\ so\colon \\ x=\frac{320\cdot3}{4} \\ x=240 \end{gathered}[/tex]There are 240 green marbles in the jar
