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Finding the Fourth Proportional to 204.40, 305.11 and 190.72

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Solution

The fourth proportional to 204.40, 305.11 and 190.72 is: 284.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.40 : 305.11 = 190.72 : x
  2. Step 2: Convert to fraction form
    204.40/305.11 = 190.72/x
  3. Step 3: Cross multiply
    204.40x = 305.11 × 190.72
  4. Step 4: Simplify right side
    204.40x = 58,190.58
  5. Step 5: Solve for x
    x = 58,190.58/204.40
  6. Step 6: Final answer
    x = 284.69

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.