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Finding the Fourth Proportional to 731.86, 1,098.03 and 458.18

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Solution

The fourth proportional to 731.86, 1,098.03 and 458.18 is: 687.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.86 : 1,098.03 = 458.18 : x
  2. Step 2: Convert to fraction form
    731.86/1,098.03 = 458.18/x
  3. Step 3: Cross multiply
    731.86x = 1,098.03 × 458.18
  4. Step 4: Simplify right side
    731.86x = 503,095.39
  5. Step 5: Solve for x
    x = 503,095.39/731.86
  6. Step 6: Final answer
    x = 687.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.