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Finding the Fourth Proportional to 681,345.78, 940,049.04 and 394,810.50

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Solution

The fourth proportional to 681,345.78, 940,049.04 and 394,810.50 is: 544,717.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,345.78 : 940,049.04 = 394,810.50 : x
  2. Step 2: Convert to fraction form
    681,345.78/940,049.04 = 394,810.50/x
  3. Step 3: Cross multiply
    681,345.78x = 940,049.04 × 394,810.50
  4. Step 4: Simplify right side
    681,345.78x = 371,141,231,506.92
  5. Step 5: Solve for x
    x = 371,141,231,506.92/681,345.78
  6. Step 6: Final answer
    x = 544,717.88

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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.