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Finding the Fourth Proportional to 681,062.56, 939,866.32 and 394,748.72

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Solution

The fourth proportional to 681,062.56, 939,866.32 and 394,748.72 is: 544,753.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,062.56 : 939,866.32 = 394,748.72 : x
  2. Step 2: Convert to fraction form
    681,062.56/939,866.32 = 394,748.72/x
  3. Step 3: Cross multiply
    681,062.56x = 939,866.32 × 394,748.72
  4. Step 4: Simplify right side
    681,062.56x = 371,011,026,523.86
  5. Step 5: Solve for x
    x = 371,011,026,523.86/681,062.56
  6. Step 6: Final answer
    x = 544,753.23

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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.