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Finding the Third Proportional to 142.88 and 249.19

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Solution

The third proportional to 142.88 and 249.19 is: 434.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.88 : 249.19 = 249.19 : x
  2. Step 2: Convert to fraction form
    142.88/249.19 = 249.19/x
  3. Step 3: Cross multiply
    142.88x = 249.19 × 249.19
  4. Step 4: Simplify right side
    142.88x = 62,094.41
  5. Step 5: Solve for x
    x = 62,094.41/142.88
  6. Step 6: Final answer
    x = 434.61

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Why These Related Problems?

These problems maintain the same ratio (1.74) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.