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Finding the Fourth Proportional to 227.55, 339.67 and 212.17

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Solution

The fourth proportional to 227.55, 339.67 and 212.17 is: 316.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.55 : 339.67 = 212.17 : x
  2. Step 2: Convert to fraction form
    227.55/339.67 = 212.17/x
  3. Step 3: Cross multiply
    227.55x = 339.67 × 212.17
  4. Step 4: Simplify right side
    227.55x = 72,067.24
  5. Step 5: Solve for x
    x = 72,067.24/227.55
  6. Step 6: Final answer
    x = 316.71

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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.