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Finding the Fourth Proportional to 681,347.28, 940,051.10 and 394,812

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Solution

The fourth proportional to 681,347.28, 940,051.10 and 394,812 is: 544,719.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,347.28 : 940,051.10 = 394,812 : x
  2. Step 2: Convert to fraction form
    681,347.28/940,051.10 = 394,812/x
  3. Step 3: Cross multiply
    681,347.28x = 940,051.10 × 394,812
  4. Step 4: Simplify right side
    681,347.28x = 371,143,454,893.20
  5. Step 5: Solve for x
    x = 371,143,454,893.20/681,347.28
  6. Step 6: Final answer
    x = 544,719.95

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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.