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Finding the Fourth Proportional to 219.96, 331.11 and 168.89

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Solution

The fourth proportional to 219.96, 331.11 and 168.89 is: 254.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.96 : 331.11 = 168.89 : x
  2. Step 2: Convert to fraction form
    219.96/331.11 = 168.89/x
  3. Step 3: Cross multiply
    219.96x = 331.11 × 168.89
  4. Step 4: Simplify right side
    219.96x = 55,919.51
  5. Step 5: Solve for x
    x = 55,919.51/219.96
  6. Step 6: Final answer
    x = 254.23

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.