Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains 4 liters of natural oil for every 3 liters of synthetic oil. In order to make 371 liters of Petrolyn oil, how many liters of synthetic oil are needed?

Question

crispyrat · Answer

so if i had a ratio of 2:1 red balls:blue balls and had 6 balls in all how much red balls would i have?

jhonyy9 · Answer

from these given details result that for 7 liter Petrolyn motor oil are needed 3 liters of synthetic oil
so using the rule of 3 simple you can write

3 liters of synthetic oil are needed for 7 liters of Petrolyn oil
x liters of synthetic oil are needed for 371 liters of Petrolyn oil - cross multiplie and calcule 
                                                                                                               the x value

x = 3*371/7 = ?

hope helped understandably easy