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Finding the Fourth Proportional to 216.18, 323.91 and 119.79

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Solution

The fourth proportional to 216.18, 323.91 and 119.79 is: 179.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.18 : 323.91 = 119.79 : x
  2. Step 2: Convert to fraction form
    216.18/323.91 = 119.79/x
  3. Step 3: Cross multiply
    216.18x = 323.91 × 119.79
  4. Step 4: Simplify right side
    216.18x = 38,801.18
  5. Step 5: Solve for x
    x = 38,801.18/216.18
  6. Step 6: Final answer
    x = 179.49

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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.