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Finding the Fourth Proportional to 222.27, 306.80 and 138.29

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Solution

The fourth proportional to 222.27, 306.80 and 138.29 is: 190.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.27 : 306.80 = 138.29 : x
  2. Step 2: Convert to fraction form
    222.27/306.80 = 138.29/x
  3. Step 3: Cross multiply
    222.27x = 306.80 × 138.29
  4. Step 4: Simplify right side
    222.27x = 42,425.67
  5. Step 5: Solve for x
    x = 42,425.67/222.27
  6. Step 6: Final answer
    x = 190.88

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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.