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Finding the Fourth Proportional to 263,257.68, 394,886.22 and 85,764.42

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Solution

The fourth proportional to 263,257.68, 394,886.22 and 85,764.42 is: 128,646.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,257.68 : 394,886.22 = 85,764.42 : x
  2. Step 2: Convert to fraction form
    263,257.68/394,886.22 = 85,764.42/x
  3. Step 3: Cross multiply
    263,257.68x = 394,886.22 × 85,764.42
  4. Step 4: Simplify right side
    263,257.68x = 33,867,187,624.29
  5. Step 5: Solve for x
    x = 33,867,187,624.29/263,257.68
  6. Step 6: Final answer
    x = 128,646.53

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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.