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Finding the Fourth Proportional to 498.30, 747.99 and 254.76

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Solution

The fourth proportional to 498.30, 747.99 and 254.76 is: 382.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.30 : 747.99 = 254.76 : x
  2. Step 2: Convert to fraction form
    498.30/747.99 = 254.76/x
  3. Step 3: Cross multiply
    498.30x = 747.99 × 254.76
  4. Step 4: Simplify right side
    498.30x = 190,557.93
  5. Step 5: Solve for x
    x = 190,557.93/498.30
  6. Step 6: Final answer
    x = 382.42

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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.