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Finding the Fourth Proportional to 321,545.70, 443,760.32 and 178,351.88

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Solution

The fourth proportional to 321,545.70, 443,760.32 and 178,351.88 is: 246,140.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,545.70 : 443,760.32 = 178,351.88 : x
  2. Step 2: Convert to fraction form
    321,545.70/443,760.32 = 178,351.88/x
  3. Step 3: Cross multiply
    321,545.70x = 443,760.32 × 178,351.88
  4. Step 4: Simplify right side
    321,545.70x = 79,145,485,568.48
  5. Step 5: Solve for x
    x = 79,145,485,568.48/321,545.70
  6. Step 6: Final answer
    x = 246,140.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.