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Finding the Fourth Proportional to 412,414.20, 617,843.70 and 212,052.60

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Solution

The fourth proportional to 412,414.20, 617,843.70 and 212,052.60 is: 317,679.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,414.20 : 617,843.70 = 212,052.60 : x
  2. Step 2: Convert to fraction form
    412,414.20/617,843.70 = 212,052.60/x
  3. Step 3: Cross multiply
    412,414.20x = 617,843.70 × 212,052.60
  4. Step 4: Simplify right side
    412,414.20x = 131,015,362,978.62
  5. Step 5: Solve for x
    x = 131,015,362,978.62/412,414.20
  6. Step 6: Final answer
    x = 317,679.08

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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.