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Finding the Fourth Proportional to 681,101.91, 939,920.90 and 394,787.97

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Solution

The fourth proportional to 681,101.91, 939,920.90 and 394,787.97 is: 544,807.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,101.91 : 939,920.90 = 394,787.97 : x
  2. Step 2: Convert to fraction form
    681,101.91/939,920.90 = 394,787.97/x
  3. Step 3: Cross multiply
    681,101.91x = 939,920.90 × 394,787.97
  4. Step 4: Simplify right side
    681,101.91x = 371,069,462,097.63
  5. Step 5: Solve for x
    x = 371,069,462,097.63/681,101.91
  6. Step 6: Final answer
    x = 544,807.55

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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.