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Finding the Fourth Proportional to 220.82, 304.31 and 206.23

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Solution

The fourth proportional to 220.82, 304.31 and 206.23 is: 284.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.82 : 304.31 = 206.23 : x
  2. Step 2: Convert to fraction form
    220.82/304.31 = 206.23/x
  3. Step 3: Cross multiply
    220.82x = 304.31 × 206.23
  4. Step 4: Simplify right side
    220.82x = 62,757.61
  5. Step 5: Solve for x
    x = 62,757.61/220.82
  6. Step 6: Final answer
    x = 284.20

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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.