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Finding the Fourth Proportional to 227.82, 312.87 and 211.76

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Solution

The fourth proportional to 227.82, 312.87 and 211.76 is: 290.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.82 : 312.87 = 211.76 : x
  2. Step 2: Convert to fraction form
    227.82/312.87 = 211.76/x
  3. Step 3: Cross multiply
    227.82x = 312.87 × 211.76
  4. Step 4: Simplify right side
    227.82x = 66,250.73
  5. Step 5: Solve for x
    x = 66,250.73/227.82
  6. Step 6: Final answer
    x = 290.81

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.