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Finding the Fourth Proportional to 220.83, 332.81 and 218.94

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Solution

The fourth proportional to 220.83, 332.81 and 218.94 is: 329.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.83 : 332.81 = 218.94 : x
  2. Step 2: Convert to fraction form
    220.83/332.81 = 218.94/x
  3. Step 3: Cross multiply
    220.83x = 332.81 × 218.94
  4. Step 4: Simplify right side
    220.83x = 72,865.97
  5. Step 5: Solve for x
    x = 72,865.97/220.83
  6. Step 6: Final answer
    x = 329.96

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.