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Finding the Fourth Proportional to 681,176.64, 940,018.56 and 394,690.56

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Solution

The fourth proportional to 681,176.64, 940,018.56 and 394,690.56 is: 544,669.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,176.64 : 940,018.56 = 394,690.56 : x
  2. Step 2: Convert to fraction form
    681,176.64/940,018.56 = 394,690.56/x
  3. Step 3: Cross multiply
    681,176.64x = 940,018.56 × 394,690.56
  4. Step 4: Simplify right side
    681,176.64x = 371,016,451,856.79
  5. Step 5: Solve for x
    x = 371,016,451,856.79/681,176.64
  6. Step 6: Final answer
    x = 544,669.96

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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.