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Finding the Fourth Proportional to 681,174.72, 940,021.40 and 394,860.88

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Solution

The fourth proportional to 681,174.72, 940,021.40 and 394,860.88 is: 544,908.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,174.72 : 940,021.40 = 394,860.88 : x
  2. Step 2: Convert to fraction form
    681,174.72/940,021.40 = 394,860.88/x
  3. Step 3: Cross multiply
    681,174.72x = 940,021.40 × 394,860.88
  4. Step 4: Simplify right side
    681,174.72x = 371,177,677,222.83
  5. Step 5: Solve for x
    x = 371,177,677,222.83/681,174.72
  6. Step 6: Final answer
    x = 544,908.18

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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.