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Finding the Third Proportional to 389,128 and 838,296

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Solution

The third proportional to 389,128 and 838,296 is: 1,805,935.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,128 : 838,296 = 838,296 : x
  2. Step 2: Convert to fraction form
    389,128/838,296 = 838,296/x
  3. Step 3: Cross multiply
    389,128x = 838,296 × 838,296
  4. Step 4: Simplify right side
    389,128x = 702,740,183,616
  5. Step 5: Solve for x
    x = 702,740,183,616/389,128
  6. Step 6: Final answer
    x = 1,805,935.79

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.