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Finding the Fourth Proportional to 263,306.67, 394,884.60 and 85,829.19

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Solution

The fourth proportional to 263,306.67, 394,884.60 and 85,829.19 is: 128,719.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,306.67 : 394,884.60 = 85,829.19 : x
  2. Step 2: Convert to fraction form
    263,306.67/394,884.60 = 85,829.19/x
  3. Step 3: Cross multiply
    263,306.67x = 394,884.60 × 85,829.19
  4. Step 4: Simplify right side
    263,306.67x = 33,892,625,361.47
  5. Step 5: Solve for x
    x = 33,892,625,361.47/263,306.67
  6. Step 6: Final answer
    x = 128,719.21

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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.