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Finding the Fourth Proportional to 220.52, 304.36 and 122.31

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Solution

The fourth proportional to 220.52, 304.36 and 122.31 is: 168.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.52 : 304.36 = 122.31 : x
  2. Step 2: Convert to fraction form
    220.52/304.36 = 122.31/x
  3. Step 3: Cross multiply
    220.52x = 304.36 × 122.31
  4. Step 4: Simplify right side
    220.52x = 37,225.97
  5. Step 5: Solve for x
    x = 37,225.97/220.52
  6. Step 6: Final answer
    x = 168.81

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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.