Add the ratio parts first. If the ratio is , the whole is divided into equal ratio units.
Each unit is worth rac{ ext{total}}{ ext{sum of ratio parts}}, and then each part gets as many units as its ratio piece says.
The strip chart is useful because it turns the ratio into visible width rather than abstract numbers.
Solve a direct proportion by filling three values, compute the matching fourth value, and inspect the equal-ratio relationship in a compact visual ladder.
Solve a direct proportion by filling three values, compute the matching fourth value, and inspect the equal-ratio relationship in a compact visual ladder.
Solve inverse proportion problems with a staged calculator, product-preserving visual, and compact formula board built for fast checks and learning.