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Finding the Fourth Proportional to 204.16, 305.84 and 126.88

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Solution

The fourth proportional to 204.16, 305.84 and 126.88 is: 190.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.16 : 305.84 = 126.88 : x
  2. Step 2: Convert to fraction form
    204.16/305.84 = 126.88/x
  3. Step 3: Cross multiply
    204.16x = 305.84 × 126.88
  4. Step 4: Simplify right side
    204.16x = 38,804.98
  5. Step 5: Solve for x
    x = 38,804.98/204.16
  6. Step 6: Final answer
    x = 190.07

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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.