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Finding the Fourth Proportional to 416,631.20, 625,432.80 and 217,176.80

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Solution

The fourth proportional to 416,631.20, 625,432.80 and 217,176.80 is: 326,018.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    416,631.20 : 625,432.80 = 217,176.80 : x
  2. Step 2: Convert to fraction form
    416,631.20/625,432.80 = 217,176.80/x
  3. Step 3: Cross multiply
    416,631.20x = 625,432.80 × 217,176.80
  4. Step 4: Simplify right side
    416,631.20x = 135,829,494,119.04
  5. Step 5: Solve for x
    x = 135,829,494,119.04/416,631.20
  6. Step 6: Final answer
    x = 326,018.54

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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.