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Finding the Third Proportional to 388,640 and 836,328

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Solution

The third proportional to 388,640 and 836,328 is: 1,799,723.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,640 : 836,328 = 836,328 : x
  2. Step 2: Convert to fraction form
    388,640/836,328 = 836,328/x
  3. Step 3: Cross multiply
    388,640x = 836,328 × 836,328
  4. Step 4: Simplify right side
    388,640x = 699,444,523,584
  5. Step 5: Solve for x
    x = 699,444,523,584/388,640
  6. Step 6: Final answer
    x = 1,799,723.46

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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.