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Finding the Fourth Proportional to 627.28, 939.84 and 352.69

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Solution

The fourth proportional to 627.28, 939.84 and 352.69 is: 528.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.28 : 939.84 = 352.69 : x
  2. Step 2: Convert to fraction form
    627.28/939.84 = 352.69/x
  3. Step 3: Cross multiply
    627.28x = 939.84 × 352.69
  4. Step 4: Simplify right side
    627.28x = 331,472.17
  5. Step 5: Solve for x
    x = 331,472.17/627.28
  6. Step 6: Final answer
    x = 528.43

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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.