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Finding the Third Proportional to 389,138 and 838,308

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Solution

The third proportional to 389,138 and 838,308 is: 1,805,941.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,138 : 838,308 = 838,308 : x
  2. Step 2: Convert to fraction form
    389,138/838,308 = 838,308/x
  3. Step 3: Cross multiply
    389,138x = 838,308 × 838,308
  4. Step 4: Simplify right side
    389,138x = 702,760,302,864
  5. Step 5: Solve for x
    x = 702,760,302,864/389,138
  6. Step 6: Final answer
    x = 1,805,941.09

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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.