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Finding the Fourth Proportional to 552.43, 762.33 and 331.26

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Solution

The fourth proportional to 552.43, 762.33 and 331.26 is: 457.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.43 : 762.33 = 331.26 : x
  2. Step 2: Convert to fraction form
    552.43/762.33 = 331.26/x
  3. Step 3: Cross multiply
    552.43x = 762.33 × 331.26
  4. Step 4: Simplify right side
    552.43x = 252,529.44
  5. Step 5: Solve for x
    x = 252,529.44/552.43
  6. Step 6: Final answer
    x = 457.12

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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.