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Finding the Third Proportional to 142.75 and 218.13

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Solution

The third proportional to 142.75 and 218.13 is: 333.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.75 : 218.13 = 218.13 : x
  2. Step 2: Convert to fraction form
    142.75/218.13 = 218.13/x
  3. Step 3: Cross multiply
    142.75x = 218.13 × 218.13
  4. Step 4: Simplify right side
    142.75x = 47,578.52
  5. Step 5: Solve for x
    x = 47,578.52/142.75
  6. Step 6: Final answer
    x = 333.30

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.