SAT Ratios and Proportions: Complete Guide
How to solve SAT ratio and proportion questions by setting up clean cross-multiplication and spotting unit conversions.
Set Up the Proportion
Write both ratios with units labeled above each number. Matching units have to stay on the same side. If they don't, you've set up the proportion backwards.
Unit Conversion Traps
SAT frequently mixes miles and kilometers, or minutes and hours, inside a single ratio problem. Always convert both sides to the same units before cross-multiplying.
What to do after reading this
- Turn the article into one action: a bank drill, a timed module, or a score calculation.
- Write down the exact skill or habit you are testing.
- Review the result before reading another guide.
Related SAT guides
- SAT Percentages: The Fast Way
Percent change, percent of, and reverse-percent questions on the Digital SAT — all solved with one consistent formula.
- SAT Word Problems: A Framework That Actually Works
A repeatable framework for SAT Math word problems: translate, set up, solve, check. Works on linear, quadratic, and ratio problems alike.
Mistakes to avoid
- Reading multiple guides without doing practice between them.
- Using broad practice when the article points to a narrow skill.
- Treating format knowledge as score improvement before testing it under time.
Use this in practice
Practice on 1600.now
Apply what you just read. Run the numbers in the SAT score calculator, take a full Digital SAT module, or drill targeted skills in the question bank.
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