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Finding the Fourth Proportional to 205.39, 308.03 and 75.38

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Solution

The fourth proportional to 205.39, 308.03 and 75.38 is: 113.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.39 : 308.03 = 75.38 : x
  2. Step 2: Convert to fraction form
    205.39/308.03 = 75.38/x
  3. Step 3: Cross multiply
    205.39x = 308.03 × 75.38
  4. Step 4: Simplify right side
    205.39x = 23,219.33
  5. Step 5: Solve for x
    x = 23,219.33/205.39
  6. Step 6: Final answer
    x = 113.05

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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.