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Finding the Third Proportional to 689 and 946

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Solution

The third proportional to 689 and 946 is: 1,298.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    689 : 946 = 946 : x
  2. Step 2: Convert to fraction form
    689/946 = 946/x
  3. Step 3: Cross multiply
    689x = 946 × 946
  4. Step 4: Simplify right side
    689x = 894,916
  5. Step 5: Solve for x
    x = 894,916/689
  6. Step 6: Final answer
    x = 1,298.86

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.