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Finding the Third Proportional to 218.75 and 343

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Solution

The third proportional to 218.75 and 343 is: 537.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.75 : 343 = 343 : x
  2. Step 2: Convert to fraction form
    218.75/343 = 343/x
  3. Step 3: Cross multiply
    218.75x = 343 × 343
  4. Step 4: Simplify right side
    218.75x = 117,649
  5. Step 5: Solve for x
    x = 117,649/218.75
  6. Step 6: Final answer
    x = 537.82

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.