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Finding the Fourth Proportional to 272.90, 409.37 and 201.21

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Solution

The fourth proportional to 272.90, 409.37 and 201.21 is: 301.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.90 : 409.37 = 201.21 : x
  2. Step 2: Convert to fraction form
    272.90/409.37 = 201.21/x
  3. Step 3: Cross multiply
    272.90x = 409.37 × 201.21
  4. Step 4: Simplify right side
    272.90x = 82,368.33
  5. Step 5: Solve for x
    x = 82,368.33/272.90
  6. Step 6: Final answer
    x = 301.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.