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Finding the Fourth Proportional to 220.36, 303.88 and 217.12

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Solution

The fourth proportional to 220.36, 303.88 and 217.12 is: 299.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.36 : 303.88 = 217.12 : x
  2. Step 2: Convert to fraction form
    220.36/303.88 = 217.12/x
  3. Step 3: Cross multiply
    220.36x = 303.88 × 217.12
  4. Step 4: Simplify right side
    220.36x = 65,978.43
  5. Step 5: Solve for x
    x = 65,978.43/220.36
  6. Step 6: Final answer
    x = 299.41

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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.