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Finding the Fourth Proportional to 263,175.75, 394,804.62 and 85,640.85

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Solution

The fourth proportional to 263,175.75, 394,804.62 and 85,640.85 is: 128,474.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,175.75 : 394,804.62 = 85,640.85 : x
  2. Step 2: Convert to fraction form
    263,175.75/394,804.62 = 85,640.85/x
  3. Step 3: Cross multiply
    263,175.75x = 394,804.62 × 85,640.85
  4. Step 4: Simplify right side
    263,175.75x = 33,811,403,240.73
  5. Step 5: Solve for x
    x = 33,811,403,240.73/263,175.75
  6. Step 6: Final answer
    x = 128,474.62

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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.