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Finding the Fourth Proportional to 321,740.97, 443,150.21 and 239,806.65

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Solution

The fourth proportional to 321,740.97, 443,150.21 and 239,806.65 is: 330,297.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,740.97 : 443,150.21 = 239,806.65 : x
  2. Step 2: Convert to fraction form
    321,740.97/443,150.21 = 239,806.65/x
  3. Step 3: Cross multiply
    321,740.97x = 443,150.21 × 239,806.65
  4. Step 4: Simplify right side
    321,740.97x = 106,270,366,107.86
  5. Step 5: Solve for x
    x = 106,270,366,107.86/321,740.97
  6. Step 6: Final answer
    x = 330,297.90

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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.