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Finding the Fourth Proportional to 225.96, 338.94 and 211.72

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Solution

The fourth proportional to 225.96, 338.94 and 211.72 is: 317.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.96 : 338.94 = 211.72 : x
  2. Step 2: Convert to fraction form
    225.96/338.94 = 211.72/x
  3. Step 3: Cross multiply
    225.96x = 338.94 × 211.72
  4. Step 4: Simplify right side
    225.96x = 71,760.38
  5. Step 5: Solve for x
    x = 71,760.38/225.96
  6. Step 6: Final answer
    x = 317.58

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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.