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Finding the Fourth Proportional to 721.82, 996.09 and 459.92

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Solution

The fourth proportional to 721.82, 996.09 and 459.92 is: 634.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.82 : 996.09 = 459.92 : x
  2. Step 2: Convert to fraction form
    721.82/996.09 = 459.92/x
  3. Step 3: Cross multiply
    721.82x = 996.09 × 459.92
  4. Step 4: Simplify right side
    721.82x = 458,121.71
  5. Step 5: Solve for x
    x = 458,121.71/721.82
  6. Step 6: Final answer
    x = 634.68

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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.