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Finding the Fourth Proportional to 321,711.80, 443,962.80 and 178,471.84

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Solution

The fourth proportional to 321,711.80, 443,962.80 and 178,471.84 is: 246,291.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,711.80 : 443,962.80 = 178,471.84 : x
  2. Step 2: Convert to fraction form
    321,711.80/443,962.80 = 178,471.84/x
  3. Step 3: Cross multiply
    321,711.80x = 443,962.80 × 178,471.84
  4. Step 4: Simplify right side
    321,711.80x = 79,234,857,530.08
  5. Step 5: Solve for x
    x = 79,234,857,530.08/321,711.80
  6. Step 6: Final answer
    x = 246,291.43

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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.