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Finding the Fourth Proportional to 326,079.85, 489,119.78 and 219,791.65

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Solution

The fourth proportional to 326,079.85, 489,119.78 and 219,791.65 is: 329,687.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,079.85 : 489,119.78 = 219,791.65 : x
  2. Step 2: Convert to fraction form
    326,079.85/489,119.78 = 219,791.65/x
  3. Step 3: Cross multiply
    326,079.85x = 489,119.78 × 219,791.65
  4. Step 4: Simplify right side
    326,079.85x = 107,504,442,394.88
  5. Step 5: Solve for x
    x = 107,504,442,394.88/326,079.85
  6. Step 6: Final answer
    x = 329,687.48

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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.