Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains 3 liters of natural oil for every 4 liters of synthetic oil. If 392 liters of synthetic oil are used, how many liters of Petrolyn oil will be made?

Question

anonymous · Answer

@TaylerMarieMaloley sorry did you reply something?

disqin · Answer

Using proportions...

3 liters natural and 4 liters synthetic oil makes (3+4=) 7 liters Petrolyn oil.

392 liters of synthetic oil is added...

Assuming amount of Petrolyn oil will be $ 392+\frac{3}{4}392=686$ liters!

Boom!

anonymous · Answer

You are a god! thanks @disqin