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Finding the Fourth Proportional to 326,642.85, 489,308.18 and 226,915.65

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Solution

The fourth proportional to 326,642.85, 489,308.18 and 226,915.65 is: 339,917.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,642.85 : 489,308.18 = 226,915.65 : x
  2. Step 2: Convert to fraction form
    326,642.85/489,308.18 = 226,915.65/x
  3. Step 3: Cross multiply
    326,642.85x = 489,308.18 × 226,915.65
  4. Step 4: Simplify right side
    326,642.85x = 111,031,682,580.44
  5. Step 5: Solve for x
    x = 111,031,682,580.44/326,642.85
  6. Step 6: Final answer
    x = 339,917.69

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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.