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Finding the Fourth Proportional to 201.28, 277.75 and 112.76

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Solution

The fourth proportional to 201.28, 277.75 and 112.76 is: 155.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.28 : 277.75 = 112.76 : x
  2. Step 2: Convert to fraction form
    201.28/277.75 = 112.76/x
  3. Step 3: Cross multiply
    201.28x = 277.75 × 112.76
  4. Step 4: Simplify right side
    201.28x = 31,319.20
  5. Step 5: Solve for x
    x = 31,319.20/201.28
  6. Step 6: Final answer
    x = 155.60

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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.