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Finding the Third Proportional to 388,620 and 836,288

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Solution

The third proportional to 388,620 and 836,288 is: 1,799,643.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,620 : 836,288 = 836,288 : x
  2. Step 2: Convert to fraction form
    388,620/836,288 = 836,288/x
  3. Step 3: Cross multiply
    388,620x = 836,288 × 836,288
  4. Step 4: Simplify right side
    388,620x = 699,377,618,944
  5. Step 5: Solve for x
    x = 699,377,618,944/388,620
  6. Step 6: Final answer
    x = 1,799,643.92

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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.