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Finding the Fourth Proportional to 553.08, 762.92 and 331.90

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Solution

The fourth proportional to 553.08, 762.92 and 331.90 is: 457.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.08 : 762.92 = 331.90 : x
  2. Step 2: Convert to fraction form
    553.08/762.92 = 331.90/x
  3. Step 3: Cross multiply
    553.08x = 762.92 × 331.90
  4. Step 4: Simplify right side
    553.08x = 253,213.15
  5. Step 5: Solve for x
    x = 253,213.15/553.08
  6. Step 6: Final answer
    x = 457.82

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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.