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Finding the Fourth Proportional to 324.56, 447.96 and 299.90

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Solution

The fourth proportional to 324.56, 447.96 and 299.90 is: 413.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.56 : 447.96 = 299.90 : x
  2. Step 2: Convert to fraction form
    324.56/447.96 = 299.90/x
  3. Step 3: Cross multiply
    324.56x = 447.96 × 299.90
  4. Step 4: Simplify right side
    324.56x = 134,343.20
  5. Step 5: Solve for x
    x = 134,343.20/324.56
  6. Step 6: Final answer
    x = 413.92

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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.