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Finding the Fourth Proportional to 326.73, 489.82 and 131.61

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Solution

The fourth proportional to 326.73, 489.82 and 131.61 is: 197.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.73 : 489.82 = 131.61 : x
  2. Step 2: Convert to fraction form
    326.73/489.82 = 131.61/x
  3. Step 3: Cross multiply
    326.73x = 489.82 × 131.61
  4. Step 4: Simplify right side
    326.73x = 64,464.88
  5. Step 5: Solve for x
    x = 64,464.88/326.73
  6. Step 6: Final answer
    x = 197.30

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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.