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Finding the Fourth Proportional to 326.06, 489.11 and 109.61

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Solution

The fourth proportional to 326.06, 489.11 and 109.61 is: 164.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.06 : 489.11 = 109.61 : x
  2. Step 2: Convert to fraction form
    326.06/489.11 = 109.61/x
  3. Step 3: Cross multiply
    326.06x = 489.11 × 109.61
  4. Step 4: Simplify right side
    326.06x = 53,608.35
  5. Step 5: Solve for x
    x = 53,608.35/326.06
  6. Step 6: Final answer
    x = 164.42

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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.