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Finding the Third Proportional to 142.59 and 211.22

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Solution

The third proportional to 142.59 and 211.22 is: 312.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.59 : 211.22 = 211.22 : x
  2. Step 2: Convert to fraction form
    142.59/211.22 = 211.22/x
  3. Step 3: Cross multiply
    142.59x = 211.22 × 211.22
  4. Step 4: Simplify right side
    142.59x = 44,613.36
  5. Step 5: Solve for x
    x = 44,613.36/142.59
  6. Step 6: Final answer
    x = 312.87

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.