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Finding the Fourth Proportional to 408,042.20, 612,063.30 and 275,331.80

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Solution

The fourth proportional to 408,042.20, 612,063.30 and 275,331.80 is: 412,997.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,042.20 : 612,063.30 = 275,331.80 : x
  2. Step 2: Convert to fraction form
    408,042.20/612,063.30 = 275,331.80/x
  3. Step 3: Cross multiply
    408,042.20x = 612,063.30 × 275,331.80
  4. Step 4: Simplify right side
    408,042.20x = 168,520,490,102.94
  5. Step 5: Solve for x
    x = 168,520,490,102.94/408,042.20
  6. Step 6: Final answer
    x = 412,997.70

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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.