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Finding the Third Proportional to 269,640 and 422,960.63

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Solution

The third proportional to 269,640 and 422,960.63 is: 663,461.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,640 : 422,960.63 = 422,960.63 : x
  2. Step 2: Convert to fraction form
    269,640/422,960.63 = 422,960.63/x
  3. Step 3: Cross multiply
    269,640x = 422,960.63 × 422,960.63
  4. Step 4: Simplify right side
    269,640x = 178,895,690,300.39
  5. Step 5: Solve for x
    x = 178,895,690,300.39/269,640
  6. Step 6: Final answer
    x = 663,461.25

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.