A model train is 8 inches long and 3 inches high. If the real train is 120 inches high, how long is the real train?

Question

kinged · Answer

Just divide 120 by 3 to get the scale factor.

kairiekanahele · Answer

i did that but what do i do now the answer came out to 40

kinged · Answer

Multiply it by 8

mathmale · Answer

Please show your work; then we can comment in a more meaningful way.

Basically you need to write two separate ratios and then set them equal to one another.

mathmale · Answer

Note that two heights are given.  Write their ratio, please.

kinged · Answer

So the model train has it height 40 time smaller than the actual train, if it's length doesn't maintain that factor, then the model train is disproportionate.

mathmale · Answer

Kai:  Your input, please?

mathmale · Answer

What are the 2 given heights?

mathmale · Answer

What is the ratio of the 2 given heights?  Show your work, please.

kairiekanahele · Answer

thanks @Kinged i got the answer