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Finding the Fourth Proportional to 627,638.94, 940,927.86 and 272,385.90

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Solution

The fourth proportional to 627,638.94, 940,927.86 and 272,385.90 is: 408,348.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,638.94 : 940,927.86 = 272,385.90 : x
  2. Step 2: Convert to fraction form
    627,638.94/940,927.86 = 272,385.90/x
  3. Step 3: Cross multiply
    627,638.94x = 940,927.86 × 272,385.90
  4. Step 4: Simplify right side
    627,638.94x = 256,295,481,981.17
  5. Step 5: Solve for x
    x = 256,295,481,981.17/627,638.94
  6. Step 6: Final answer
    x = 408,348.60

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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.