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Finding the Fourth Proportional to 205.84, 309.97 and 179.11

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Solution

The fourth proportional to 205.84, 309.97 and 179.11 is: 269.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.84 : 309.97 = 179.11 : x
  2. Step 2: Convert to fraction form
    205.84/309.97 = 179.11/x
  3. Step 3: Cross multiply
    205.84x = 309.97 × 179.11
  4. Step 4: Simplify right side
    205.84x = 55,517.18
  5. Step 5: Solve for x
    x = 55,517.18/205.84
  6. Step 6: Final answer
    x = 269.72

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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.