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Finding the Fourth Proportional to 311.56, 466.44 and 218.90

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Solution

The fourth proportional to 311.56, 466.44 and 218.90 is: 327.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.56 : 466.44 = 218.90 : x
  2. Step 2: Convert to fraction form
    311.56/466.44 = 218.90/x
  3. Step 3: Cross multiply
    311.56x = 466.44 × 218.90
  4. Step 4: Simplify right side
    311.56x = 102,103.72
  5. Step 5: Solve for x
    x = 102,103.72/311.56
  6. Step 6: Final answer
    x = 327.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.