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Finding the Fourth Proportional to 324.69, 487.21 and 248.15

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Solution

The fourth proportional to 324.69, 487.21 and 248.15 is: 372.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.69 : 487.21 = 248.15 : x
  2. Step 2: Convert to fraction form
    324.69/487.21 = 248.15/x
  3. Step 3: Cross multiply
    324.69x = 487.21 × 248.15
  4. Step 4: Simplify right side
    324.69x = 120,901.16
  5. Step 5: Solve for x
    x = 120,901.16/324.69
  6. Step 6: Final answer
    x = 372.36

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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.