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Finding the Fourth Proportional to 227.82, 339.40 and 213.84

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Solution

The fourth proportional to 227.82, 339.40 and 213.84 is: 318.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.82 : 339.40 = 213.84 : x
  2. Step 2: Convert to fraction form
    227.82/339.40 = 213.84/x
  3. Step 3: Cross multiply
    227.82x = 339.40 × 213.84
  4. Step 4: Simplify right side
    227.82x = 72,577.30
  5. Step 5: Solve for x
    x = 72,577.30/227.82
  6. Step 6: Final answer
    x = 318.57

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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.