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Finding the Third Proportional to 388,236 and 823,128

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Solution

The third proportional to 388,236 and 823,128 is: 1,745,174.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,236 : 823,128 = 823,128 : x
  2. Step 2: Convert to fraction form
    388,236/823,128 = 823,128/x
  3. Step 3: Cross multiply
    388,236x = 823,128 × 823,128
  4. Step 4: Simplify right side
    388,236x = 677,539,704,384
  5. Step 5: Solve for x
    x = 677,539,704,384/388,236
  6. Step 6: Final answer
    x = 1,745,174.85

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.