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Finding the Fourth Proportional to 204.97, 307.56 and 127.92

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Solution

The fourth proportional to 204.97, 307.56 and 127.92 is: 191.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.97 : 307.56 = 127.92 : x
  2. Step 2: Convert to fraction form
    204.97/307.56 = 127.92/x
  3. Step 3: Cross multiply
    204.97x = 307.56 × 127.92
  4. Step 4: Simplify right side
    204.97x = 39,343.08
  5. Step 5: Solve for x
    x = 39,343.08/204.97
  6. Step 6: Final answer
    x = 191.95

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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.