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Finding the Fourth Proportional to 456.86, 630.24 and 423.92

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Solution

The fourth proportional to 456.86, 630.24 and 423.92 is: 584.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.86 : 630.24 = 423.92 : x
  2. Step 2: Convert to fraction form
    456.86/630.24 = 423.92/x
  3. Step 3: Cross multiply
    456.86x = 630.24 × 423.92
  4. Step 4: Simplify right side
    456.86x = 267,171.34
  5. Step 5: Solve for x
    x = 267,171.34/456.86
  6. Step 6: Final answer
    x = 584.80

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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.