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Finding the Third Proportional to 688.13 and 937.31

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Solution

The third proportional to 688.13 and 937.31 is: 1,276.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.13 : 937.31 = 937.31 : x
  2. Step 2: Convert to fraction form
    688.13/937.31 = 937.31/x
  3. Step 3: Cross multiply
    688.13x = 937.31 × 937.31
  4. Step 4: Simplify right side
    688.13x = 878,554.72
  5. Step 5: Solve for x
    x = 878,554.72/688.13
  6. Step 6: Final answer
    x = 1,276.74

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.