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Finding the Fourth Proportional to 263,317.68, 394,901.10 and 85,840.20

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Solution

The fourth proportional to 263,317.68, 394,901.10 and 85,840.20 is: 128,735.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,317.68 : 394,901.10 = 85,840.20 : x
  2. Step 2: Convert to fraction form
    263,317.68/394,901.10 = 85,840.20/x
  3. Step 3: Cross multiply
    263,317.68x = 394,901.10 × 85,840.20
  4. Step 4: Simplify right side
    263,317.68x = 33,898,389,404.22
  5. Step 5: Solve for x
    x = 33,898,389,404.22/263,317.68
  6. Step 6: Final answer
    x = 128,735.71

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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.