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Finding the Third Proportional to 292,706 and 638,456

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Solution

The third proportional to 292,706 and 638,456 is: 1,392,612.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,706 : 638,456 = 638,456 : x
  2. Step 2: Convert to fraction form
    292,706/638,456 = 638,456/x
  3. Step 3: Cross multiply
    292,706x = 638,456 × 638,456
  4. Step 4: Simplify right side
    292,706x = 407,626,063,936
  5. Step 5: Solve for x
    x = 407,626,063,936/292,706
  6. Step 6: Final answer
    x = 1,392,612.60

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.