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Finding the Fourth Proportional to 205.38, 283.30 and 126.68

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Solution

The fourth proportional to 205.38, 283.30 and 126.68 is: 174.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.38 : 283.30 = 126.68 : x
  2. Step 2: Convert to fraction form
    205.38/283.30 = 126.68/x
  3. Step 3: Cross multiply
    205.38x = 283.30 × 126.68
  4. Step 4: Simplify right side
    205.38x = 35,886.71
  5. Step 5: Solve for x
    x = 35,886.71/205.38
  6. Step 6: Final answer
    x = 174.73

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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.