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Finding the Third Proportional to 687 and 883

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Solution

The third proportional to 687 and 883 is: 1,134.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    687 : 883 = 883 : x
  2. Step 2: Convert to fraction form
    687/883 = 883/x
  3. Step 3: Cross multiply
    687x = 883 × 883
  4. Step 4: Simplify right side
    687x = 779,689
  5. Step 5: Solve for x
    x = 779,689/687
  6. Step 6: Final answer
    x = 1,134.92

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Why These Related Problems?

These problems maintain the same ratio (1.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.