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Finding the Fourth Proportional to 498.74, 748.04 and 238.66

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Solution

The fourth proportional to 498.74, 748.04 and 238.66 is: 357.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.74 : 748.04 = 238.66 : x
  2. Step 2: Convert to fraction form
    498.74/748.04 = 238.66/x
  3. Step 3: Cross multiply
    498.74x = 748.04 × 238.66
  4. Step 4: Simplify right side
    498.74x = 178,525.95
  5. Step 5: Solve for x
    x = 178,525.95/498.74
  6. Step 6: Final answer
    x = 357.96

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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.