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Finding the Fourth Proportional to 227.34, 312.90 and 161.73

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Solution

The fourth proportional to 227.34, 312.90 and 161.73 is: 222.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.34 : 312.90 = 161.73 : x
  2. Step 2: Convert to fraction form
    227.34/312.90 = 161.73/x
  3. Step 3: Cross multiply
    227.34x = 312.90 × 161.73
  4. Step 4: Simplify right side
    227.34x = 50,605.32
  5. Step 5: Solve for x
    x = 50,605.32/227.34
  6. Step 6: Final answer
    x = 222.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.