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Finding the Fourth Proportional to 266.22, 367.38 and 161.28

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Solution

The fourth proportional to 266.22, 367.38 and 161.28 is: 222.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.22 : 367.38 = 161.28 : x
  2. Step 2: Convert to fraction form
    266.22/367.38 = 161.28/x
  3. Step 3: Cross multiply
    266.22x = 367.38 × 161.28
  4. Step 4: Simplify right side
    266.22x = 59,251.05
  5. Step 5: Solve for x
    x = 59,251.05/266.22
  6. Step 6: Final answer
    x = 222.56

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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.