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Finding the Fourth Proportional to 681,346.28, 940,049.72 and 394,811

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Solution

The fourth proportional to 681,346.28, 940,049.72 and 394,811 is: 544,718.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,346.28 : 940,049.72 = 394,811 : x
  2. Step 2: Convert to fraction form
    681,346.28/940,049.72 = 394,811/x
  3. Step 3: Cross multiply
    681,346.28x = 940,049.72 × 394,811
  4. Step 4: Simplify right side
    681,346.28x = 371,141,970,002.92
  5. Step 5: Solve for x
    x = 371,141,970,002.92/681,346.28
  6. Step 6: Final answer
    x = 544,718.57

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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.