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Finding the Fourth Proportional to 324.05, 447.05 and 199.85

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Solution

The fourth proportional to 324.05, 447.05 and 199.85 is: 275.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.05 : 447.05 = 199.85 : x
  2. Step 2: Convert to fraction form
    324.05/447.05 = 199.85/x
  3. Step 3: Cross multiply
    324.05x = 447.05 × 199.85
  4. Step 4: Simplify right side
    324.05x = 89,341.21
  5. Step 5: Solve for x
    x = 89,341.21/324.05
  6. Step 6: Final answer
    x = 275.71

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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.