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Finding the Third Proportional to 292,364 and 638,836

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Solution

The third proportional to 292,364 and 638,836 is: 1,395,901.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,364 : 638,836 = 638,836 : x
  2. Step 2: Convert to fraction form
    292,364/638,836 = 638,836/x
  3. Step 3: Cross multiply
    292,364x = 638,836 × 638,836
  4. Step 4: Simplify right side
    292,364x = 408,111,434,896
  5. Step 5: Solve for x
    x = 408,111,434,896/292,364
  6. Step 6: Final answer
    x = 1,395,901.80

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.