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Finding the Fourth Proportional to 627.94, 865.92 and 379.21

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Solution

The fourth proportional to 627.94, 865.92 and 379.21 is: 522.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.94 : 865.92 = 379.21 : x
  2. Step 2: Convert to fraction form
    627.94/865.92 = 379.21/x
  3. Step 3: Cross multiply
    627.94x = 865.92 × 379.21
  4. Step 4: Simplify right side
    627.94x = 328,365.52
  5. Step 5: Solve for x
    x = 328,365.52/627.94
  6. Step 6: Final answer
    x = 522.92

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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.