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Finding the Fourth Proportional to 498.97, 748.47 and 210.61

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Solution

The fourth proportional to 498.97, 748.47 and 210.61 is: 315.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.97 : 748.47 = 210.61 : x
  2. Step 2: Convert to fraction form
    498.97/748.47 = 210.61/x
  3. Step 3: Cross multiply
    498.97x = 748.47 × 210.61
  4. Step 4: Simplify right side
    498.97x = 157,635.27
  5. Step 5: Solve for x
    x = 157,635.27/498.97
  6. Step 6: Final answer
    x = 315.92

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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.