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Finding the Fourth Proportional to 204.86, 307.62 and 127.98

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Solution

The fourth proportional to 204.86, 307.62 and 127.98 is: 192.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.86 : 307.62 = 127.98 : x
  2. Step 2: Convert to fraction form
    204.86/307.62 = 127.98/x
  3. Step 3: Cross multiply
    204.86x = 307.62 × 127.98
  4. Step 4: Simplify right side
    204.86x = 39,369.21
  5. Step 5: Solve for x
    x = 39,369.21/204.86
  6. Step 6: Final answer
    x = 192.18

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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.