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Finding the Fourth Proportional to 411,517.80, 617,276.70 and 131,063.40

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Solution

The fourth proportional to 411,517.80, 617,276.70 and 131,063.40 is: 196,595.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,517.80 : 617,276.70 = 131,063.40 : x
  2. Step 2: Convert to fraction form
    411,517.80/617,276.70 = 131,063.40/x
  3. Step 3: Cross multiply
    411,517.80x = 617,276.70 × 131,063.40
  4. Step 4: Simplify right side
    411,517.80x = 80,902,383,042.78
  5. Step 5: Solve for x
    x = 80,902,383,042.78/411,517.80
  6. Step 6: Final answer
    x = 196,595.10

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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.