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Finding the Fourth Proportional to 574,362.90, 861,872.40 and 396,997.20

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Solution

The fourth proportional to 574,362.90, 861,872.40 and 396,997.20 is: 595,722.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    574,362.90 : 861,872.40 = 396,997.20 : x
  2. Step 2: Convert to fraction form
    574,362.90/861,872.40 = 396,997.20/x
  3. Step 3: Cross multiply
    574,362.90x = 861,872.40 × 396,997.20
  4. Step 4: Simplify right side
    574,362.90x = 342,160,929,557.28
  5. Step 5: Solve for x
    x = 342,160,929,557.28/574,362.90
  6. Step 6: Final answer
    x = 595,722.55

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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.