Home / 1,318.30-1,977.24-440.79

Finding the Fourth Proportional to 1,318.30, 1,977.24 and 440.79

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Solution

The fourth proportional to 1,318.30, 1,977.24 and 440.79 is: 661.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.30 : 1,977.24 = 440.79 : x
  2. Step 2: Convert to fraction form
    1,318.30/1,977.24 = 440.79/x
  3. Step 3: Cross multiply
    1,318.30x = 1,977.24 × 440.79
  4. Step 4: Simplify right side
    1,318.30x = 871,545.42
  5. Step 5: Solve for x
    x = 871,545.42/1,318.30
  6. Step 6: Final answer
    x = 661.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.