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Finding the Third Proportional to 388,621 and 836,292

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Solution

The third proportional to 388,621 and 836,292 is: 1,799,656.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,621 : 836,292 = 836,292 : x
  2. Step 2: Convert to fraction form
    388,621/836,292 = 836,292/x
  3. Step 3: Cross multiply
    388,621x = 836,292 × 836,292
  4. Step 4: Simplify right side
    388,621x = 699,384,309,264
  5. Step 5: Solve for x
    x = 699,384,309,264/388,621
  6. Step 6: Final answer
    x = 1,799,656.50

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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.