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Finding the Fourth Proportional to 321,912.12, 444,217.86 and 178,672.20

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Solution

The fourth proportional to 321,912.12, 444,217.86 and 178,672.20 is: 246,556.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,912.12 : 444,217.86 = 178,672.20 : x
  2. Step 2: Convert to fraction form
    321,912.12/444,217.86 = 178,672.20/x
  3. Step 3: Cross multiply
    321,912.12x = 444,217.86 × 178,672.20
  4. Step 4: Simplify right side
    321,912.12x = 79,369,382,325.49
  5. Step 5: Solve for x
    x = 79,369,382,325.49/321,912.12
  6. Step 6: Final answer
    x = 246,556.05

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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.