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Finding the Third Proportional to 277,048 and 421,404

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Solution

The third proportional to 277,048 and 421,404 is: 640,976.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    277,048 : 421,404 = 421,404 : x
  2. Step 2: Convert to fraction form
    277,048/421,404 = 421,404/x
  3. Step 3: Cross multiply
    277,048x = 421,404 × 421,404
  4. Step 4: Simplify right side
    277,048x = 177,581,331,216
  5. Step 5: Solve for x
    x = 177,581,331,216/277,048
  6. Step 6: Final answer
    x = 640,976.77

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.