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Finding the Fourth Proportional to 204.88, 308.96 and 189.88

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Solution

The fourth proportional to 204.88, 308.96 and 189.88 is: 286.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.88 : 308.96 = 189.88 : x
  2. Step 2: Convert to fraction form
    204.88/308.96 = 189.88/x
  3. Step 3: Cross multiply
    204.88x = 308.96 × 189.88
  4. Step 4: Simplify right side
    204.88x = 58,665.32
  5. Step 5: Solve for x
    x = 58,665.32/204.88
  6. Step 6: Final answer
    x = 286.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.