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Finding the Fourth Proportional to 323,805.22, 485,815.39 and 143,865.61

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Solution

The fourth proportional to 323,805.22, 485,815.39 and 143,865.61 is: 215,846.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,805.22 : 485,815.39 = 143,865.61 : x
  2. Step 2: Convert to fraction form
    323,805.22/485,815.39 = 143,865.61/x
  3. Step 3: Cross multiply
    323,805.22x = 485,815.39 × 143,865.61
  4. Step 4: Simplify right side
    323,805.22x = 69,892,125,855.54
  5. Step 5: Solve for x
    x = 69,892,125,855.54/323,805.22
  6. Step 6: Final answer
    x = 215,846.20

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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.