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Finding the Fourth Proportional to 325.92, 449.79 and 215.61

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Solution

The fourth proportional to 325.92, 449.79 and 215.61 is: 297.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.92 : 449.79 = 215.61 : x
  2. Step 2: Convert to fraction form
    325.92/449.79 = 215.61/x
  3. Step 3: Cross multiply
    325.92x = 449.79 × 215.61
  4. Step 4: Simplify right side
    325.92x = 96,979.22
  5. Step 5: Solve for x
    x = 96,979.22/325.92
  6. Step 6: Final answer
    x = 297.56

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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.