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Finding the Fourth Proportional to 326.60, 489.97 and 162.16

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Solution

The fourth proportional to 326.60, 489.97 and 162.16 is: 243.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.60 : 489.97 = 162.16 : x
  2. Step 2: Convert to fraction form
    326.60/489.97 = 162.16/x
  3. Step 3: Cross multiply
    326.60x = 489.97 × 162.16
  4. Step 4: Simplify right side
    326.60x = 79,450.68
  5. Step 5: Solve for x
    x = 79,450.68/326.60
  6. Step 6: Final answer
    x = 243.27

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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.