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Finding the Fourth Proportional to 323,621.20, 485,201.40 and 123,864.40

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Solution

The fourth proportional to 323,621.20, 485,201.40 and 123,864.40 is: 185,708.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,621.20 : 485,201.40 = 123,864.40 : x
  2. Step 2: Convert to fraction form
    323,621.20/485,201.40 = 123,864.40/x
  3. Step 3: Cross multiply
    323,621.20x = 485,201.40 × 123,864.40
  4. Step 4: Simplify right side
    323,621.20x = 60,099,180,290.16
  5. Step 5: Solve for x
    x = 60,099,180,290.16/323,621.20
  6. Step 6: Final answer
    x = 185,708.42

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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.