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Finding the Fourth Proportional to 201.81, 303.09 and 141.24

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Solution

The fourth proportional to 201.81, 303.09 and 141.24 is: 212.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.81 : 303.09 = 141.24 : x
  2. Step 2: Convert to fraction form
    201.81/303.09 = 141.24/x
  3. Step 3: Cross multiply
    201.81x = 303.09 × 141.24
  4. Step 4: Simplify right side
    201.81x = 42,808.43
  5. Step 5: Solve for x
    x = 42,808.43/201.81
  6. Step 6: Final answer
    x = 212.12

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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.