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Finding the Fourth Proportional to 681,830.41, 940,717.42 and 395,293.30

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Solution

The fourth proportional to 681,830.41, 940,717.42 and 395,293.30 is: 545,383.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,830.41 : 940,717.42 = 395,293.30 : x
  2. Step 2: Convert to fraction form
    681,830.41/940,717.42 = 395,293.30/x
  3. Step 3: Cross multiply
    681,830.41x = 940,717.42 × 395,293.30
  4. Step 4: Simplify right side
    681,830.41x = 371,859,293,319.29
  5. Step 5: Solve for x
    x = 371,859,293,319.29/681,830.41
  6. Step 6: Final answer
    x = 545,383.85

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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.