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Finding the Fourth Proportional to 424.38, 582.54 and 391.56

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Solution

The fourth proportional to 424.38, 582.54 and 391.56 is: 537.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.38 : 582.54 = 391.56 : x
  2. Step 2: Convert to fraction form
    424.38/582.54 = 391.56/x
  3. Step 3: Cross multiply
    424.38x = 582.54 × 391.56
  4. Step 4: Simplify right side
    424.38x = 228,099.36
  5. Step 5: Solve for x
    x = 228,099.36/424.38
  6. Step 6: Final answer
    x = 537.49

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.