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Finding the Fourth Proportional to 681,068.56, 939,874.60 and 394,754.72

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Solution

The fourth proportional to 681,068.56, 939,874.60 and 394,754.72 is: 544,761.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,068.56 : 939,874.60 = 394,754.72 : x
  2. Step 2: Convert to fraction form
    681,068.56/939,874.60 = 394,754.72/x
  3. Step 3: Cross multiply
    681,068.56x = 939,874.60 × 394,754.72
  4. Step 4: Simplify right side
    681,068.56x = 371,019,934,558.11
  5. Step 5: Solve for x
    x = 371,019,934,558.11/681,068.56
  6. Step 6: Final answer
    x = 544,761.51

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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.