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Finding the Fourth Proportional to 220.33, 326.60 and 216.89

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Solution

The fourth proportional to 220.33, 326.60 and 216.89 is: 321.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.33 : 326.60 = 216.89 : x
  2. Step 2: Convert to fraction form
    220.33/326.60 = 216.89/x
  3. Step 3: Cross multiply
    220.33x = 326.60 × 216.89
  4. Step 4: Simplify right side
    220.33x = 70,836.27
  5. Step 5: Solve for x
    x = 70,836.27/220.33
  6. Step 6: Final answer
    x = 321.50

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.