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Finding the Fourth Proportional to 263,272.60, 394,908.90 and 85,777.30

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Solution

The fourth proportional to 263,272.60, 394,908.90 and 85,777.30 is: 128,665.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,272.60 : 394,908.90 = 85,777.30 : x
  2. Step 2: Convert to fraction form
    263,272.60/394,908.90 = 85,777.30/x
  3. Step 3: Cross multiply
    263,272.60x = 394,908.90 × 85,777.30
  4. Step 4: Simplify right side
    263,272.60x = 33,874,219,187.97
  5. Step 5: Solve for x
    x = 33,874,219,187.97/263,272.60
  6. Step 6: Final answer
    x = 128,665.95

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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.