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Finding the Fourth Proportional to 201.94, 280.51 and 196.18

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Solution

The fourth proportional to 201.94, 280.51 and 196.18 is: 272.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.94 : 280.51 = 196.18 : x
  2. Step 2: Convert to fraction form
    201.94/280.51 = 196.18/x
  3. Step 3: Cross multiply
    201.94x = 280.51 × 196.18
  4. Step 4: Simplify right side
    201.94x = 55,030.45
  5. Step 5: Solve for x
    x = 55,030.45/201.94
  6. Step 6: Final answer
    x = 272.51

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.