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Finding the Fourth Proportional to 323,815.20, 485,722.80 and 206,008.80

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Solution

The fourth proportional to 323,815.20, 485,722.80 and 206,008.80 is: 309,013.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,815.20 : 485,722.80 = 206,008.80 : x
  2. Step 2: Convert to fraction form
    323,815.20/485,722.80 = 206,008.80/x
  3. Step 3: Cross multiply
    323,815.20x = 485,722.80 × 206,008.80
  4. Step 4: Simplify right side
    323,815.20x = 100,063,171,160.64
  5. Step 5: Solve for x
    x = 100,063,171,160.64/323,815.20
  6. Step 6: Final answer
    x = 309,013.20

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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.