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Finding the Fourth Proportional to 263,397.66, 395,084.63 and 85,906.20

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Solution

The fourth proportional to 263,397.66, 395,084.63 and 85,906.20 is: 128,855.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,397.66 : 395,084.63 = 85,906.20 : x
  2. Step 2: Convert to fraction form
    263,397.66/395,084.63 = 85,906.20/x
  3. Step 3: Cross multiply
    263,397.66x = 395,084.63 × 85,906.20
  4. Step 4: Simplify right side
    263,397.66x = 33,940,218,812.18
  5. Step 5: Solve for x
    x = 33,940,218,812.18/263,397.66
  6. Step 6: Final answer
    x = 128,855.43

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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.