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Finding the Fourth Proportional to 263,939.60, 395,905.80 and 86,452.40

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Solution

The fourth proportional to 263,939.60, 395,905.80 and 86,452.40 is: 129,677.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,939.60 : 395,905.80 = 86,452.40 : x
  2. Step 2: Convert to fraction form
    263,939.60/395,905.80 = 86,452.40/x
  3. Step 3: Cross multiply
    263,939.60x = 395,905.80 × 86,452.40
  4. Step 4: Simplify right side
    263,939.60x = 34,227,006,583.92
  5. Step 5: Solve for x
    x = 34,227,006,583.92/263,939.60
  6. Step 6: Final answer
    x = 129,677.42

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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.