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Finding the Fourth Proportional to 439.46, 658.28 and 317.96

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Solution

The fourth proportional to 439.46, 658.28 and 317.96 is: 476.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.46 : 658.28 = 317.96 : x
  2. Step 2: Convert to fraction form
    439.46/658.28 = 317.96/x
  3. Step 3: Cross multiply
    439.46x = 658.28 × 317.96
  4. Step 4: Simplify right side
    439.46x = 209,306.71
  5. Step 5: Solve for x
    x = 209,306.71/439.46
  6. Step 6: Final answer
    x = 476.28

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