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Finding the Fourth Proportional to 552.60, 762.65 and 331.61

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Solution

The fourth proportional to 552.60, 762.65 and 331.61 is: 457.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.60 : 762.65 = 331.61 : x
  2. Step 2: Convert to fraction form
    552.60/762.65 = 331.61/x
  3. Step 3: Cross multiply
    552.60x = 762.65 × 331.61
  4. Step 4: Simplify right side
    552.60x = 252,898.14
  5. Step 5: Solve for x
    x = 252,898.14/552.60
  6. Step 6: Final answer
    x = 457.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.