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Finding the Third Proportional to 330.50 and 517.75

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Solution

The third proportional to 330.50 and 517.75 is: 811.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.50 : 517.75 = 517.75 : x
  2. Step 2: Convert to fraction form
    330.50/517.75 = 517.75/x
  3. Step 3: Cross multiply
    330.50x = 517.75 × 517.75
  4. Step 4: Simplify right side
    330.50x = 268,065.06
  5. Step 5: Solve for x
    x = 268,065.06/330.50
  6. Step 6: Final answer
    x = 811.09

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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.