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Finding the Third Proportional to 143.38 and 202.19

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Solution

The third proportional to 143.38 and 202.19 is: 285.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.38 : 202.19 = 202.19 : x
  2. Step 2: Convert to fraction form
    143.38/202.19 = 202.19/x
  3. Step 3: Cross multiply
    143.38x = 202.19 × 202.19
  4. Step 4: Simplify right side
    143.38x = 40,879.79
  5. Step 5: Solve for x
    x = 40,879.79/143.38
  6. Step 6: Final answer
    x = 285.12

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.