Tool guide
Solve simple proportions with unknown value. Useful for solving direct proportion, solving inverse proportion and scaling revenue, production or productivity.
When to use it
- solve direct proportion: It helps to discover a proportional value when quantities grow together.
- solve inverse proportion: It is used for scenarios in which increasing one quantity reduces the other.
- scale revenue, production or productivity: Allows you to quickly adjust volumes and times while maintaining the correct ratio.
How to read the result
- In the direct rule, increasing one quantity tends to increase the other by the same ratio.
- In the inverse rule, increasing one quantity tends to reduce the other, keeping the product proportional.
- The answer makes sense only if the quantities compared really have a proportional relationship.
Inputs that deserve attention
- Type of relationship: Defines whether the proportion between quantities is direct or inverse. Choosing the wrong type completely reverses the logic of the result.
- Values A, B and C: Set up the known relationship used to find the fourth proportional value. Use comparable quantities and keep the same unit in each logical column.
- Result: Delivers the proportional value consistent with the type of relationship chosen. Validate whether the expected behavior increases or decreases before accepting the answer.
Method used
- The calculation solves the fourth proportional value from the three terms entered.
- The type chosen defines whether the cross multiplication follows direct or inverse proportionality.
Limits and validation
- The tool assumes simple proportional relationship and does not cover models with extra curves, bands or constraints.
- If the problem has more variables or non-linear behavior, the calculation may induce error.
- The interface clearly separates the type of ratio and the three values used in the ratio.
