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Finding the Fourth Proportional to 681,344.28, 940,046.97 and 394,809

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Solution

The fourth proportional to 681,344.28, 940,046.97 and 394,809 is: 544,715.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,344.28 : 940,046.97 = 394,809 : x
  2. Step 2: Convert to fraction form
    681,344.28/940,046.97 = 394,809/x
  3. Step 3: Cross multiply
    681,344.28x = 940,046.97 × 394,809
  4. Step 4: Simplify right side
    681,344.28x = 371,139,004,178.73
  5. Step 5: Solve for x
    x = 371,139,004,178.73/681,344.28
  6. Step 6: Final answer
    x = 544,715.81

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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.