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Finding the Fourth Proportional to 201.29, 277.72 and 122.64

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Solution

The fourth proportional to 201.29, 277.72 and 122.64 is: 169.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.29 : 277.72 = 122.64 : x
  2. Step 2: Convert to fraction form
    201.29/277.72 = 122.64/x
  3. Step 3: Cross multiply
    201.29x = 277.72 × 122.64
  4. Step 4: Simplify right side
    201.29x = 34,059.58
  5. Step 5: Solve for x
    x = 34,059.58/201.29
  6. Step 6: Final answer
    x = 169.21

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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.