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Finding the Fourth Proportional to 223.65, 335.91 and 215.97

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Solution

The fourth proportional to 223.65, 335.91 and 215.97 is: 324.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.65 : 335.91 = 215.97 : x
  2. Step 2: Convert to fraction form
    223.65/335.91 = 215.97/x
  3. Step 3: Cross multiply
    223.65x = 335.91 × 215.97
  4. Step 4: Simplify right side
    223.65x = 72,546.48
  5. Step 5: Solve for x
    x = 72,546.48/223.65
  6. Step 6: Final answer
    x = 324.38

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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.