1. What is the Rule of 3?

The Rule of 3 is a mathematical method for solving proportions. It allows you to find an unknown value when three other values in a proportional relationship are known.

2. How Does the Calculator Work?

The calculator uses the Rule of 3 equation:

Where:

• \( a \) — First known value (same unit as b)
• \( b \) — Second known value (unitless)
• \( c \) — Third known value (unitless)
• \( x \) — Unknown value to be calculated (same unit as c)

Explanation: The equation establishes a proportional relationship between the known values to calculate the unknown fourth value.

3. Importance of Rule of 3 Calculation

Details: The Rule of 3 is fundamental in mathematics and has practical applications in everyday life, including cooking, construction, finance, and many other fields where proportional relationships exist.

4. Using the Calculator

Tips: Enter all three known values (a, b, and c). All values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: When should I use the Rule of 3?
A: Use it whenever you have a proportional relationship between values and need to find an unknown fourth value.

Q2: Can the Rule of 3 be used with different units?
A: Yes, but you must ensure consistent units between corresponding values (a and b should have the same units, c and x should have the same units).

Q3: What if my proportion is inverse rather than direct?
A: For inverse proportions, the formula becomes x = (a × c) / b instead of (b × c) / a.

Q4: Are there limitations to the Rule of 3?
A: It only works for linear proportional relationships and assumes a direct correlation between the values.

Q5: Can I use decimals or fractions with this calculator?
A: Yes, the calculator accepts decimal values for more precise calculations.