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Finding the Fourth Proportional to 627.46, 939.34 and 395.64

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Solution

The fourth proportional to 627.46, 939.34 and 395.64 is: 592.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.46 : 939.34 = 395.64 : x
  2. Step 2: Convert to fraction form
    627.46/939.34 = 395.64/x
  3. Step 3: Cross multiply
    627.46x = 939.34 × 395.64
  4. Step 4: Simplify right side
    627.46x = 371,640.48
  5. Step 5: Solve for x
    x = 371,640.48/627.46
  6. Step 6: Final answer
    x = 592.29

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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.