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Finding the Fourth Proportional to 681,163.71, 939,994.11 and 394,710.45

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Solution

The fourth proportional to 681,163.71, 939,994.11 and 394,710.45 is: 544,693.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,163.71 : 939,994.11 = 394,710.45 : x
  2. Step 2: Convert to fraction form
    681,163.71/939,994.11 = 394,710.45/x
  3. Step 3: Cross multiply
    681,163.71x = 939,994.11 × 394,710.45
  4. Step 4: Simplify right side
    681,163.71x = 371,025,498,155.45
  5. Step 5: Solve for x
    x = 371,025,498,155.45/681,163.71
  6. Step 6: Final answer
    x = 544,693.58

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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.