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Finding the Fourth Proportional to 326.73, 489.91 and 239.25

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Solution

The fourth proportional to 326.73, 489.91 and 239.25 is: 358.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.73 : 489.91 = 239.25 : x
  2. Step 2: Convert to fraction form
    326.73/489.91 = 239.25/x
  3. Step 3: Cross multiply
    326.73x = 489.91 × 239.25
  4. Step 4: Simplify right side
    326.73x = 117,210.97
  5. Step 5: Solve for x
    x = 117,210.97/326.73
  6. Step 6: Final answer
    x = 358.74

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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.