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Finding the Fourth Proportional to 324.93, 488.40 and 217.41

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Solution

The fourth proportional to 324.93, 488.40 and 217.41 is: 326.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.93 : 488.40 = 217.41 : x
  2. Step 2: Convert to fraction form
    324.93/488.40 = 217.41/x
  3. Step 3: Cross multiply
    324.93x = 488.40 × 217.41
  4. Step 4: Simplify right side
    324.93x = 106,183.04
  5. Step 5: Solve for x
    x = 106,183.04/324.93
  6. Step 6: Final answer
    x = 326.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.