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Finding the Fourth Proportional to 498.88, 748.32 and 254.80

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Solution

The fourth proportional to 498.88, 748.32 and 254.80 is: 382.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.88 : 748.32 = 254.80 : x
  2. Step 2: Convert to fraction form
    498.88/748.32 = 254.80/x
  3. Step 3: Cross multiply
    498.88x = 748.32 × 254.80
  4. Step 4: Simplify right side
    498.88x = 190,671.94
  5. Step 5: Solve for x
    x = 190,671.94/498.88
  6. Step 6: Final answer
    x = 382.20

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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.