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Finding the Fourth Proportional to 205.71, 308.85 and 133.04

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Solution

The fourth proportional to 205.71, 308.85 and 133.04 is: 199.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.71 : 308.85 = 133.04 : x
  2. Step 2: Convert to fraction form
    205.71/308.85 = 133.04/x
  3. Step 3: Cross multiply
    205.71x = 308.85 × 133.04
  4. Step 4: Simplify right side
    205.71x = 41,089.68
  5. Step 5: Solve for x
    x = 41,089.68/205.71
  6. Step 6: Final answer
    x = 199.75

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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.