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Finding the Fourth Proportional to 205.82, 308.82 and 84.04

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Solution

The fourth proportional to 205.82, 308.82 and 84.04 is: 126.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.82 : 308.82 = 84.04 : x
  2. Step 2: Convert to fraction form
    205.82/308.82 = 84.04/x
  3. Step 3: Cross multiply
    205.82x = 308.82 × 84.04
  4. Step 4: Simplify right side
    205.82x = 25,953.23
  5. Step 5: Solve for x
    x = 25,953.23/205.82
  6. Step 6: Final answer
    x = 126.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.