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Finding the Third Proportional to 510.75 and 664.88

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Solution

The third proportional to 510.75 and 664.88 is: 865.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.75 : 664.88 = 664.88 : x
  2. Step 2: Convert to fraction form
    510.75/664.88 = 664.88/x
  3. Step 3: Cross multiply
    510.75x = 664.88 × 664.88
  4. Step 4: Simplify right side
    510.75x = 442,058.77
  5. Step 5: Solve for x
    x = 442,058.77/510.75
  6. Step 6: Final answer
    x = 865.51

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.