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Finding the Fourth Proportional to 223.94, 335.91 and 121.21

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Solution

The fourth proportional to 223.94, 335.91 and 121.21 is: 181.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.94 : 335.91 = 121.21 : x
  2. Step 2: Convert to fraction form
    223.94/335.91 = 121.21/x
  3. Step 3: Cross multiply
    223.94x = 335.91 × 121.21
  4. Step 4: Simplify right side
    223.94x = 40,715.65
  5. Step 5: Solve for x
    x = 40,715.65/223.94
  6. Step 6: Final answer
    x = 181.82

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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.