#SAT MATH #Directly Proportion #Unit Conversion (SAMPLE of PSD 1)

Horsepower and watts are units of measure of power. They are directly proportional such that 5 horsepower is equal to 3730 watts. How much power, in watts, is equal to 2 horsepower???
How can you solve this problem? I provide TWO methods. Which is the best for you???
MATHEMATICS IS LANGUAGE. IF YOU CAN UNDERSTAND THIS LANGUAGE, YOU WILL CHOOSE THE BEST METHOD. I HOPE YOU BUILD UP YOUR OWN MATH DNA.

I classify PSDs(Problem Solving and Data Analysis) into 9 topics :
PSD 1. Ratios, Rates, and Proportions.

For PSD 1, there are 4 types of Problems ;
PSD 1.1. Ratios
PSD 1.2. Rates (Speeds)
PSD 1.3. Other Rates
PSD 1.4. Directly and Inversely Proportions Word Problems

Go to the next sample : PSD 2. Percentages