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Finding the Fourth Proportional to 658.56, 909.60 and 462.72

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Solution

The fourth proportional to 658.56, 909.60 and 462.72 is: 639.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.56 : 909.60 = 462.72 : x
  2. Step 2: Convert to fraction form
    658.56/909.60 = 462.72/x
  3. Step 3: Cross multiply
    658.56x = 909.60 × 462.72
  4. Step 4: Simplify right side
    658.56x = 420,890.11
  5. Step 5: Solve for x
    x = 420,890.11/658.56
  6. Step 6: Final answer
    x = 639.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.