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Finding the Fourth Proportional to 440.27, 658.46 and 391.87

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Solution

The fourth proportional to 440.27, 658.46 and 391.87 is: 586.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.27 : 658.46 = 391.87 : x
  2. Step 2: Convert to fraction form
    440.27/658.46 = 391.87/x
  3. Step 3: Cross multiply
    440.27x = 658.46 × 391.87
  4. Step 4: Simplify right side
    440.27x = 258,027.43
  5. Step 5: Solve for x
    x = 258,027.43/440.27
  6. Step 6: Final answer
    x = 586.07

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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.