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Finding the Fourth Proportional to 498.89, 748.18 and 238.74

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Solution

The fourth proportional to 498.89, 748.18 and 238.74 is: 358.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.89 : 748.18 = 238.74 : x
  2. Step 2: Convert to fraction form
    498.89/748.18 = 238.74/x
  3. Step 3: Cross multiply
    498.89x = 748.18 × 238.74
  4. Step 4: Simplify right side
    498.89x = 178,620.49
  5. Step 5: Solve for x
    x = 178,620.49/498.89
  6. Step 6: Final answer
    x = 358.04

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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.