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Finding the Fourth Proportional to 216.78, 298.92 and 167.55

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Solution

The fourth proportional to 216.78, 298.92 and 167.55 is: 231.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.78 : 298.92 = 167.55 : x
  2. Step 2: Convert to fraction form
    216.78/298.92 = 167.55/x
  3. Step 3: Cross multiply
    216.78x = 298.92 × 167.55
  4. Step 4: Simplify right side
    216.78x = 50,084.05
  5. Step 5: Solve for x
    x = 50,084.05/216.78
  6. Step 6: Final answer
    x = 231.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.