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Finding the Third Proportional to 517.88 and 808.31

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Solution

The third proportional to 517.88 and 808.31 is: 1,261.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.88 : 808.31 = 808.31 : x
  2. Step 2: Convert to fraction form
    517.88/808.31 = 808.31/x
  3. Step 3: Cross multiply
    517.88x = 808.31 × 808.31
  4. Step 4: Simplify right side
    517.88x = 653,369.10
  5. Step 5: Solve for x
    x = 653,369.10/517.88
  6. Step 6: Final answer
    x = 1,261.63

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.