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Finding the Fourth Proportional to 201.15, 277.53 and 126.43

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Solution

The fourth proportional to 201.15, 277.53 and 126.43 is: 174.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.15 : 277.53 = 126.43 : x
  2. Step 2: Convert to fraction form
    201.15/277.53 = 126.43/x
  3. Step 3: Cross multiply
    201.15x = 277.53 × 126.43
  4. Step 4: Simplify right side
    201.15x = 35,086.95
  5. Step 5: Solve for x
    x = 35,086.95/201.15
  6. Step 6: Final answer
    x = 174.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.