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Finding the Fourth Proportional to 324.89, 487.43 and 276.48

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Solution

The fourth proportional to 324.89, 487.43 and 276.48 is: 414.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.89 : 487.43 = 276.48 : x
  2. Step 2: Convert to fraction form
    324.89/487.43 = 276.48/x
  3. Step 3: Cross multiply
    324.89x = 487.43 × 276.48
  4. Step 4: Simplify right side
    324.89x = 134,764.65
  5. Step 5: Solve for x
    x = 134,764.65/324.89
  6. Step 6: Final answer
    x = 414.80

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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.