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Finding the Fourth Proportional to 681,175.72, 940,022.78 and 394,861.88

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Solution

The fourth proportional to 681,175.72, 940,022.78 and 394,861.88 is: 544,909.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,175.72 : 940,022.78 = 394,861.88 : x
  2. Step 2: Convert to fraction form
    681,175.72/940,022.78 = 394,861.88/x
  3. Step 3: Cross multiply
    681,175.72x = 940,022.78 × 394,861.88
  4. Step 4: Simplify right side
    681,175.72x = 371,179,162,153.63
  5. Step 5: Solve for x
    x = 371,179,162,153.63/681,175.72
  6. Step 6: Final answer
    x = 544,909.56

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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.