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Finding the Third Proportional to 211.50 and 371

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Solution

The third proportional to 211.50 and 371 is: 650.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.50 : 371 = 371 : x
  2. Step 2: Convert to fraction form
    211.50/371 = 371/x
  3. Step 3: Cross multiply
    211.50x = 371 × 371
  4. Step 4: Simplify right side
    211.50x = 137,641
  5. Step 5: Solve for x
    x = 137,641/211.50
  6. Step 6: Final answer
    x = 650.78

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Why These Related Problems?

These problems maintain the same ratio (1.75) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.