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Finding the Fourth Proportional to 201.29, 277.77 and 112.78

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Solution

The fourth proportional to 201.29, 277.77 and 112.78 is: 155.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.29 : 277.77 = 112.78 : x
  2. Step 2: Convert to fraction form
    201.29/277.77 = 112.78/x
  3. Step 3: Cross multiply
    201.29x = 277.77 × 112.78
  4. Step 4: Simplify right side
    201.29x = 31,326.90
  5. Step 5: Solve for x
    x = 31,326.90/201.29
  6. Step 6: Final answer
    x = 155.63

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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.