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Finding the Third Proportional to 211.50 and 349.75

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Solution

The third proportional to 211.50 and 349.75 is: 578.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.50 : 349.75 = 349.75 : x
  2. Step 2: Convert to fraction form
    211.50/349.75 = 349.75/x
  3. Step 3: Cross multiply
    211.50x = 349.75 × 349.75
  4. Step 4: Simplify right side
    211.50x = 122,325.06
  5. Step 5: Solve for x
    x = 122,325.06/211.50
  6. Step 6: Final answer
    x = 578.37

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Why These Related Problems?

These problems maintain the same ratio (1.65) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.