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Finding the Fourth Proportional to 222.22, 331.27 and 218.71

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Solution

The fourth proportional to 222.22, 331.27 and 218.71 is: 326.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.22 : 331.27 = 218.71 : x
  2. Step 2: Convert to fraction form
    222.22/331.27 = 218.71/x
  3. Step 3: Cross multiply
    222.22x = 331.27 × 218.71
  4. Step 4: Simplify right side
    222.22x = 72,452.06
  5. Step 5: Solve for x
    x = 72,452.06/222.22
  6. Step 6: Final answer
    x = 326.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.