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Finding the Fourth Proportional to 263,304.15, 394,997.22 and 85,769.88

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Solution

The fourth proportional to 263,304.15, 394,997.22 and 85,769.88 is: 128,668.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,304.15 : 394,997.22 = 85,769.88 : x
  2. Step 2: Convert to fraction form
    263,304.15/394,997.22 = 85,769.88/x
  3. Step 3: Cross multiply
    263,304.15x = 394,997.22 × 85,769.88
  4. Step 4: Simplify right side
    263,304.15x = 33,878,864,159.73
  5. Step 5: Solve for x
    x = 33,878,864,159.73/263,304.15
  6. Step 6: Final answer
    x = 128,668.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.