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Finding the Fourth Proportional to 217.45, 324.29 and 199.73

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Solution

The fourth proportional to 217.45, 324.29 and 199.73 is: 297.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.45 : 324.29 = 199.73 : x
  2. Step 2: Convert to fraction form
    217.45/324.29 = 199.73/x
  3. Step 3: Cross multiply
    217.45x = 324.29 × 199.73
  4. Step 4: Simplify right side
    217.45x = 64,770.63
  5. Step 5: Solve for x
    x = 64,770.63/217.45
  6. Step 6: Final answer
    x = 297.86

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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.