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Finding the Fourth Proportional to 681,062.74, 939,866.57 and 394,748.90

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Solution

The fourth proportional to 681,062.74, 939,866.57 and 394,748.90 is: 544,753.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,062.74 : 939,866.57 = 394,748.90 : x
  2. Step 2: Convert to fraction form
    681,062.74/939,866.57 = 394,748.90/x
  3. Step 3: Cross multiply
    681,062.74x = 939,866.57 × 394,748.90
  4. Step 4: Simplify right side
    681,062.74x = 371,011,293,291.48
  5. Step 5: Solve for x
    x = 371,011,293,291.48/681,062.74
  6. Step 6: Final answer
    x = 544,753.48

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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.