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Finding the Third Proportional to 389,568 and 838,320

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Solution

The third proportional to 389,568 and 838,320 is: 1,803,999.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,568 : 838,320 = 838,320 : x
  2. Step 2: Convert to fraction form
    389,568/838,320 = 838,320/x
  3. Step 3: Cross multiply
    389,568x = 838,320 × 838,320
  4. Step 4: Simplify right side
    389,568x = 702,780,422,400
  5. Step 5: Solve for x
    x = 702,780,422,400/389,568
  6. Step 6: Final answer
    x = 1,803,999.36

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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.