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Finding the Fourth Proportional to 205.30, 283.20 and 126.73

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Solution

The fourth proportional to 205.30, 283.20 and 126.73 is: 174.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.30 : 283.20 = 126.73 : x
  2. Step 2: Convert to fraction form
    205.30/283.20 = 126.73/x
  3. Step 3: Cross multiply
    205.30x = 283.20 × 126.73
  4. Step 4: Simplify right side
    205.30x = 35,889.94
  5. Step 5: Solve for x
    x = 35,889.94/205.30
  6. Step 6: Final answer
    x = 174.82

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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.