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Finding the Fourth Proportional to 263,351.62, 394,986.09 and 85,857.73

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Solution

The fourth proportional to 263,351.62, 394,986.09 and 85,857.73 is: 128,773.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,351.62 : 394,986.09 = 85,857.73 : x
  2. Step 2: Convert to fraction form
    263,351.62/394,986.09 = 85,857.73/x
  3. Step 3: Cross multiply
    263,351.62x = 394,986.09 × 85,857.73
  4. Step 4: Simplify right side
    263,351.62x = 33,912,609,068.98
  5. Step 5: Solve for x
    x = 33,912,609,068.98/263,351.62
  6. Step 6: Final answer
    x = 128,773.12

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1.5x scale

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.