Direct Proportion Calculator
Solve direct proportion problems quickly and easily. Enter three known values to find the unknown fourth value.
Result:
Understanding Direct Proportion:
Direct proportion means that as one quantity increases, the other quantity increases at the same rate. In this calculator, we use the relationship:
This can be read as: Value 1 is to Value 2 as Value 3 is to Value 4.
Calculation Steps:
What is Direct Proportion?
Direct proportion describes a relationship between two quantities where they increase or decrease together at a constant ratio. If one quantity doubles, the other doubles as well. It's often represented as a/b = c/d, where if you know three of the values, you can find the fourth.
This concept is widely used in everyday life, from scaling recipes in cooking to calculating distances on maps, understanding currency exchange rates, and adjusting ingredients in baking. For example, if 2 apples cost $1, then 4 apples will directly proportionally cost $2. This calculator helps you quickly solve these types of problems by finding the missing value in a direct proportion.
- Formula: Value 4 = (Value 3 × Value 2) / Value 1
- Use Cases: Scaling recipes, calculating costs, unit conversions, similar triangles, etc.
- Related Concepts: Ratios, rates, unit rates, proportionality.