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Finding the Fourth Proportional to 324.46, 449.72 and 319.24

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Solution

The fourth proportional to 324.46, 449.72 and 319.24 is: 442.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.46 : 449.72 = 319.24 : x
  2. Step 2: Convert to fraction form
    324.46/449.72 = 319.24/x
  3. Step 3: Cross multiply
    324.46x = 449.72 × 319.24
  4. Step 4: Simplify right side
    324.46x = 143,568.61
  5. Step 5: Solve for x
    x = 143,568.61/324.46
  6. Step 6: Final answer
    x = 442.48

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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.