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Finding the Fourth Proportional to 498.76, 748.14 and 255.15

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Solution

The fourth proportional to 498.76, 748.14 and 255.15 is: 382.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.76 : 748.14 = 255.15 : x
  2. Step 2: Convert to fraction form
    498.76/748.14 = 255.15/x
  3. Step 3: Cross multiply
    498.76x = 748.14 × 255.15
  4. Step 4: Simplify right side
    498.76x = 190,886.96
  5. Step 5: Solve for x
    x = 190,886.96/498.76
  6. Step 6: Final answer
    x = 382.73

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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.