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Finding the Fourth Proportional to 220.66, 332.28 and 163.28

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Solution

The fourth proportional to 220.66, 332.28 and 163.28 is: 245.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.66 : 332.28 = 163.28 : x
  2. Step 2: Convert to fraction form
    220.66/332.28 = 163.28/x
  3. Step 3: Cross multiply
    220.66x = 332.28 × 163.28
  4. Step 4: Simplify right side
    220.66x = 54,253.63
  5. Step 5: Solve for x
    x = 54,253.63/220.66
  6. Step 6: Final answer
    x = 245.87

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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.