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Finding the Fourth Proportional to 552.64, 762.40 and 331.52

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Solution

The fourth proportional to 552.64, 762.40 and 331.52 is: 457.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.64 : 762.40 = 331.52 : x
  2. Step 2: Convert to fraction form
    552.64/762.40 = 331.52/x
  3. Step 3: Cross multiply
    552.64x = 762.40 × 331.52
  4. Step 4: Simplify right side
    552.64x = 252,750.85
  5. Step 5: Solve for x
    x = 252,750.85/552.64
  6. Step 6: Final answer
    x = 457.35

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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.