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Finding the Fourth Proportional to 658.56, 908.48 and 422.36

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Solution

The fourth proportional to 658.56, 908.48 and 422.36 is: 582.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.56 : 908.48 = 422.36 : x
  2. Step 2: Convert to fraction form
    658.56/908.48 = 422.36/x
  3. Step 3: Cross multiply
    658.56x = 908.48 × 422.36
  4. Step 4: Simplify right side
    658.56x = 383,705.61
  5. Step 5: Solve for x
    x = 383,705.61/658.56
  6. Step 6: Final answer
    x = 582.64

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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.