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Finding the Fourth Proportional to 326.92, 489.18 and 268.96

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Solution

The fourth proportional to 326.92, 489.18 and 268.96 is: 402.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.92 : 489.18 = 268.96 : x
  2. Step 2: Convert to fraction form
    326.92/489.18 = 268.96/x
  3. Step 3: Cross multiply
    326.92x = 489.18 × 268.96
  4. Step 4: Simplify right side
    326.92x = 131,569.85
  5. Step 5: Solve for x
    x = 131,569.85/326.92
  6. Step 6: Final answer
    x = 402.45

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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.