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Finding the Fourth Proportional to 205.86, 308.78 and 108.33

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Solution

The fourth proportional to 205.86, 308.78 and 108.33 is: 162.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.86 : 308.78 = 108.33 : x
  2. Step 2: Convert to fraction form
    205.86/308.78 = 108.33/x
  3. Step 3: Cross multiply
    205.86x = 308.78 × 108.33
  4. Step 4: Simplify right side
    205.86x = 33,448.84
  5. Step 5: Solve for x
    x = 33,448.84/205.86
  6. Step 6: Final answer
    x = 162.48

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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.