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Finding the Fourth Proportional to 323,821.20, 485,731.80 and 206,014.80

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Solution

The fourth proportional to 323,821.20, 485,731.80 and 206,014.80 is: 309,022.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,821.20 : 485,731.80 = 206,014.80 : x
  2. Step 2: Convert to fraction form
    323,821.20/485,731.80 = 206,014.80/x
  3. Step 3: Cross multiply
    323,821.20x = 485,731.80 × 206,014.80
  4. Step 4: Simplify right side
    323,821.20x = 100,067,939,630.64
  5. Step 5: Solve for x
    x = 100,067,939,630.64/323,821.20
  6. Step 6: Final answer
    x = 309,022.20

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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.