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Finding the Fourth Proportional to 220.51, 304.29 and 122.26

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Solution

The fourth proportional to 220.51, 304.29 and 122.26 is: 168.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.51 : 304.29 = 122.26 : x
  2. Step 2: Convert to fraction form
    220.51/304.29 = 122.26/x
  3. Step 3: Cross multiply
    220.51x = 304.29 × 122.26
  4. Step 4: Simplify right side
    220.51x = 37,201.73
  5. Step 5: Solve for x
    x = 37,201.73/220.51
  6. Step 6: Final answer
    x = 168.71

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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.