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Finding the Fourth Proportional to 222.18, 331.07 and 208.23

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Solution

The fourth proportional to 222.18, 331.07 and 208.23 is: 310.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.18 : 331.07 = 208.23 : x
  2. Step 2: Convert to fraction form
    222.18/331.07 = 208.23/x
  3. Step 3: Cross multiply
    222.18x = 331.07 × 208.23
  4. Step 4: Simplify right side
    222.18x = 68,937.66
  5. Step 5: Solve for x
    x = 68,937.66/222.18
  6. Step 6: Final answer
    x = 310.28

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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.