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Finding the Fourth Proportional to 681,990.98, 941,151.61 and 395,681.54

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Solution

The fourth proportional to 681,990.98, 941,151.61 and 395,681.54 is: 546,042.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,990.98 : 941,151.61 = 395,681.54 : x
  2. Step 2: Convert to fraction form
    681,990.98/941,151.61 = 395,681.54/x
  3. Step 3: Cross multiply
    681,990.98x = 941,151.61 × 395,681.54
  4. Step 4: Simplify right side
    681,990.98x = 372,396,318,418.28
  5. Step 5: Solve for x
    x = 372,396,318,418.28/681,990.98
  6. Step 6: Final answer
    x = 546,042.88

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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.