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Finding the Fourth Proportional to 221.97, 333.17 and 208.76

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Solution

The fourth proportional to 221.97, 333.17 and 208.76 is: 313.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.97 : 333.17 = 208.76 : x
  2. Step 2: Convert to fraction form
    221.97/333.17 = 208.76/x
  3. Step 3: Cross multiply
    221.97x = 333.17 × 208.76
  4. Step 4: Simplify right side
    221.97x = 69,549.86
  5. Step 5: Solve for x
    x = 69,549.86/221.97
  6. Step 6: Final answer
    x = 313.33

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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.