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Finding the Fourth Proportional to 476.64, 658.56 and 421.44

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Solution

The fourth proportional to 476.64, 658.56 and 421.44 is: 582.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.64 : 658.56 = 421.44 : x
  2. Step 2: Convert to fraction form
    476.64/658.56 = 421.44/x
  3. Step 3: Cross multiply
    476.64x = 658.56 × 421.44
  4. Step 4: Simplify right side
    476.64x = 277,543.53
  5. Step 5: Solve for x
    x = 277,543.53/476.64
  6. Step 6: Final answer
    x = 582.29

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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.