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Finding the Fourth Proportional to 218.22, 301.11 and 165.75

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Solution

The fourth proportional to 218.22, 301.11 and 165.75 is: 228.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.22 : 301.11 = 165.75 : x
  2. Step 2: Convert to fraction form
    218.22/301.11 = 165.75/x
  3. Step 3: Cross multiply
    218.22x = 301.11 × 165.75
  4. Step 4: Simplify right side
    218.22x = 49,908.98
  5. Step 5: Solve for x
    x = 49,908.98/218.22
  6. Step 6: Final answer
    x = 228.71

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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.