Composed Rule of Three

Composed Rule of Three is your pocket calculator for proportional math problems you encounter every day. Whether you're scaling recipes, converting measurements, or solving real-world ratios, this app makes cross multiplication instant and effortless.

Handle simple and compound proportions with ease. Calculate direct and inverse ratios exactly as you learned in school—but faster. Need to know how much 20 oranges cost if 3 cost 9 pounds? Enter the values and get your answer instantly. Solving complex scenarios becomes straightforward: figure out how many hours 3 cows take to produce 30 litres of milk, or determine how many workers you need to build multiple walls in a specific timeframe.

Perfect for students reinforcing mathematical concepts, professionals managing budgets and resources, and anyone who needs quick proportional calculations without mental math errors. The interface mirrors classic rule of three methodology, so there's no learning curve—just familiar problem-solving made faster.

Whether you're checking homework, planning a project, or tackling everyday estimation, Composed Rule of Three delivers accurate results in seconds. Stop second-guessing your calculations and start solving ratios with confidence.