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Finding the Fourth Proportional to 202.72, 304.42 and 126.13

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Solution

The fourth proportional to 202.72, 304.42 and 126.13 is: 189.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.72 : 304.42 = 126.13 : x
  2. Step 2: Convert to fraction form
    202.72/304.42 = 126.13/x
  3. Step 3: Cross multiply
    202.72x = 304.42 × 126.13
  4. Step 4: Simplify right side
    202.72x = 38,396.49
  5. Step 5: Solve for x
    x = 38,396.49/202.72
  6. Step 6: Final answer
    x = 189.41

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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.