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Finding the Fourth Proportional to 220.17, 303.83 and 121.92

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Solution

The fourth proportional to 220.17, 303.83 and 121.92 is: 168.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.17 : 303.83 = 121.92 : x
  2. Step 2: Convert to fraction form
    220.17/303.83 = 121.92/x
  3. Step 3: Cross multiply
    220.17x = 303.83 × 121.92
  4. Step 4: Simplify right side
    220.17x = 37,043.54
  5. Step 5: Solve for x
    x = 37,043.54/220.17
  6. Step 6: Final answer
    x = 168.25

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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.