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Finding the Fourth Proportional to 204.38, 305.89 and 127.08

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Solution

The fourth proportional to 204.38, 305.89 and 127.08 is: 190.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.38 : 305.89 = 127.08 : x
  2. Step 2: Convert to fraction form
    204.38/305.89 = 127.08/x
  3. Step 3: Cross multiply
    204.38x = 305.89 × 127.08
  4. Step 4: Simplify right side
    204.38x = 38,872.50
  5. Step 5: Solve for x
    x = 38,872.50/204.38
  6. Step 6: Final answer
    x = 190.20

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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.