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Finding the Fourth Proportional to 1,331,840, 1,997,761.92 and 543,872

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Solution

The fourth proportional to 1,331,840, 1,997,761.92 and 543,872 is: 815,808.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331,840 : 1,997,761.92 = 543,872 : x
  2. Step 2: Convert to fraction form
    1,331,840/1,997,761.92 = 543,872/x
  3. Step 3: Cross multiply
    1,331,840x = 1,997,761.92 × 543,872
  4. Step 4: Simplify right side
    1,331,840x = 1,086,526,770,954.24
  5. Step 5: Solve for x
    x = 1,086,526,770,954.24/1,331,840
  6. Step 6: Final answer
    x = 815,808.78

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.