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Finding the Fourth Proportional to 262,708.83, 394,120.89 and 85,233.78

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Solution

The fourth proportional to 262,708.83, 394,120.89 and 85,233.78 is: 127,869.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,708.83 : 394,120.89 = 85,233.78 : x
  2. Step 2: Convert to fraction form
    262,708.83/394,120.89 = 85,233.78/x
  3. Step 3: Cross multiply
    262,708.83x = 394,120.89 × 85,233.78
  4. Step 4: Simplify right side
    262,708.83x = 33,592,413,231.66
  5. Step 5: Solve for x
    x = 33,592,413,231.66/262,708.83
  6. Step 6: Final answer
    x = 127,869.37

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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.