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Finding the Fourth Proportional to 204.57, 307 and 127.64

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Solution

The fourth proportional to 204.57, 307 and 127.64 is: 191.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.57 : 307 = 127.64 : x
  2. Step 2: Convert to fraction form
    204.57/307 = 127.64/x
  3. Step 3: Cross multiply
    204.57x = 307 × 127.64
  4. Step 4: Simplify right side
    204.57x = 39,185.48
  5. Step 5: Solve for x
    x = 39,185.48/204.57
  6. Step 6: Final answer
    x = 191.55

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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.