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Finding the Fourth Proportional to 498.85, 748.43 and 255.55

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Solution

The fourth proportional to 498.85, 748.43 and 255.55 is: 383.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.85 : 748.43 = 255.55 : x
  2. Step 2: Convert to fraction form
    498.85/748.43 = 255.55/x
  3. Step 3: Cross multiply
    498.85x = 748.43 × 255.55
  4. Step 4: Simplify right side
    498.85x = 191,260.97
  5. Step 5: Solve for x
    x = 191,260.97/498.85
  6. Step 6: Final answer
    x = 383.40

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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.