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Finding the Fourth Proportional to 404.27, 557.90 and 229.61

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Solution

The fourth proportional to 404.27, 557.90 and 229.61 is: 316.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.27 : 557.90 = 229.61 : x
  2. Step 2: Convert to fraction form
    404.27/557.90 = 229.61/x
  3. Step 3: Cross multiply
    404.27x = 557.90 × 229.61
  4. Step 4: Simplify right side
    404.27x = 128,099.42
  5. Step 5: Solve for x
    x = 128,099.42/404.27
  6. Step 6: Final answer
    x = 316.87

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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.