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Finding the Fourth Proportional to 205.81, 309.02 and 119.24

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Solution

The fourth proportional to 205.81, 309.02 and 119.24 is: 179.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.81 : 309.02 = 119.24 : x
  2. Step 2: Convert to fraction form
    205.81/309.02 = 119.24/x
  3. Step 3: Cross multiply
    205.81x = 309.02 × 119.24
  4. Step 4: Simplify right side
    205.81x = 36,845.40
  5. Step 5: Solve for x
    x = 36,845.40/205.81
  6. Step 6: Final answer
    x = 179.03

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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.