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Finding the Fourth Proportional to 220.90, 305.19 and 168.66

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Solution

The fourth proportional to 220.90, 305.19 and 168.66 is: 233.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.90 : 305.19 = 168.66 : x
  2. Step 2: Convert to fraction form
    220.90/305.19 = 168.66/x
  3. Step 3: Cross multiply
    220.90x = 305.19 × 168.66
  4. Step 4: Simplify right side
    220.90x = 51,472.96
  5. Step 5: Solve for x
    x = 51,472.96/220.90
  6. Step 6: Final answer
    x = 233.01

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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.