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Finding the Fourth Proportional to 220.78, 304.44 and 171.54

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Solution

The fourth proportional to 220.78, 304.44 and 171.54 is: 236.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.78 : 304.44 = 171.54 : x
  2. Step 2: Convert to fraction form
    220.78/304.44 = 171.54/x
  3. Step 3: Cross multiply
    220.78x = 304.44 × 171.54
  4. Step 4: Simplify right side
    220.78x = 52,223.64
  5. Step 5: Solve for x
    x = 52,223.64/220.78
  6. Step 6: Final answer
    x = 236.54

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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.