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Finding the Third Proportional to 322.88 and 512.88

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Solution

The third proportional to 322.88 and 512.88 is: 814.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.88 : 512.88 = 512.88 : x
  2. Step 2: Convert to fraction form
    322.88/512.88 = 512.88/x
  3. Step 3: Cross multiply
    322.88x = 512.88 × 512.88
  4. Step 4: Simplify right side
    322.88x = 263,040.77
  5. Step 5: Solve for x
    x = 263,040.77/322.88
  6. Step 6: Final answer
    x = 814.68

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.