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Finding the Third Proportional to 392,657 and 622,761

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Solution

The third proportional to 392,657 and 622,761 is: 987,710.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,657 : 622,761 = 622,761 : x
  2. Step 2: Convert to fraction form
    392,657/622,761 = 622,761/x
  3. Step 3: Cross multiply
    392,657x = 622,761 × 622,761
  4. Step 4: Simplify right side
    392,657x = 387,831,263,121
  5. Step 5: Solve for x
    x = 387,831,263,121/392,657
  6. Step 6: Final answer
    x = 987,710.04

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.