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Simple Rule of Three

Explanation

The Simple Rule of Three is a mathematical method used to solve proportions and establish relationships between proportional quantities. This technique is especially useful when we know three values and want to find a fourth related one.

The core principle is that if two quantities are proportional, the ratio between them remains constant. To solve a problem using the Simple Rule of Three, follow these steps:

  1. Identify the quantities and values: Define the two proportional quantities and the known values.
  2. Set up the proportion: Create a proportion equation with the known values.
  3. Solve for the unknown: Solve the equation to find the unknown value.

For example, if 2 meters correspond to 5 seconds, we can use the rule to find how long it takes to travel 8 meters.

Basic formula:

a⁄b = c⁄d

Where:

  • a and c: values of one quantity.
  • b and d: values of the other quantity.

This method is widely used in mathematics, physics, chemistry, and any field that requires proportional analysis.