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Finding the Fourth Proportional to 204.72, 306.72 and 108.60

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Solution

The fourth proportional to 204.72, 306.72 and 108.60 is: 162.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.72 : 306.72 = 108.60 : x
  2. Step 2: Convert to fraction form
    204.72/306.72 = 108.60/x
  3. Step 3: Cross multiply
    204.72x = 306.72 × 108.60
  4. Step 4: Simplify right side
    204.72x = 33,309.79
  5. Step 5: Solve for x
    x = 33,309.79/204.72
  6. Step 6: Final answer
    x = 162.71

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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.