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Finding the Fourth Proportional to 201.21, 277.79 and 131.29

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Solution

The fourth proportional to 201.21, 277.79 and 131.29 is: 181.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.21 : 277.79 = 131.29 : x
  2. Step 2: Convert to fraction form
    201.21/277.79 = 131.29/x
  3. Step 3: Cross multiply
    201.21x = 277.79 × 131.29
  4. Step 4: Simplify right side
    201.21x = 36,471.05
  5. Step 5: Solve for x
    x = 36,471.05/201.21
  6. Step 6: Final answer
    x = 181.26

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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.