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Finding the Fourth Proportional to 227.89, 315.93 and 215.57

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Solution

The fourth proportional to 227.89, 315.93 and 215.57 is: 298.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.89 : 315.93 = 215.57 : x
  2. Step 2: Convert to fraction form
    227.89/315.93 = 215.57/x
  3. Step 3: Cross multiply
    227.89x = 315.93 × 215.57
  4. Step 4: Simplify right side
    227.89x = 68,105.82
  5. Step 5: Solve for x
    x = 68,105.82/227.89
  6. Step 6: Final answer
    x = 298.86

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.