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Finding the Fourth Proportional to 326.38, 489.59 and 161.93

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Solution

The fourth proportional to 326.38, 489.59 and 161.93 is: 242.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.38 : 489.59 = 161.93 : x
  2. Step 2: Convert to fraction form
    326.38/489.59 = 161.93/x
  3. Step 3: Cross multiply
    326.38x = 489.59 × 161.93
  4. Step 4: Simplify right side
    326.38x = 79,279.31
  5. Step 5: Solve for x
    x = 79,279.31/326.38
  6. Step 6: Final answer
    x = 242.90

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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.