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Finding the Third Proportional to 214.75 and 268.88

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Solution

The third proportional to 214.75 and 268.88 is: 336.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.75 : 268.88 = 268.88 : x
  2. Step 2: Convert to fraction form
    214.75/268.88 = 268.88/x
  3. Step 3: Cross multiply
    214.75x = 268.88 × 268.88
  4. Step 4: Simplify right side
    214.75x = 72,293.77
  5. Step 5: Solve for x
    x = 72,293.77/214.75
  6. Step 6: Final answer
    x = 336.64

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Why These Related Problems?

These problems maintain the same ratio (1.25) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.