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Finding the Fourth Proportional to 220.48, 303.92 and 165.28

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Solution

The fourth proportional to 220.48, 303.92 and 165.28 is: 227.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.48 : 303.92 = 165.28 : x
  2. Step 2: Convert to fraction form
    220.48/303.92 = 165.28/x
  3. Step 3: Cross multiply
    220.48x = 303.92 × 165.28
  4. Step 4: Simplify right side
    220.48x = 50,231.90
  5. Step 5: Solve for x
    x = 50,231.90/220.48
  6. Step 6: Final answer
    x = 227.83

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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.