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Finding the Fourth Proportional to 221.33, 330.59 and 199.62

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Solution

The fourth proportional to 221.33, 330.59 and 199.62 is: 298.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.33 : 330.59 = 199.62 : x
  2. Step 2: Convert to fraction form
    221.33/330.59 = 199.62/x
  3. Step 3: Cross multiply
    221.33x = 330.59 × 199.62
  4. Step 4: Simplify right side
    221.33x = 65,992.87
  5. Step 5: Solve for x
    x = 65,992.87/221.33
  6. Step 6: Final answer
    x = 298.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.