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Finding the Third Proportional to 323,398 and 698,420

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Solution

The third proportional to 323,398 and 698,420 is: 1,508,328.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,398 : 698,420 = 698,420 : x
  2. Step 2: Convert to fraction form
    323,398/698,420 = 698,420/x
  3. Step 3: Cross multiply
    323,398x = 698,420 × 698,420
  4. Step 4: Simplify right side
    323,398x = 487,790,496,400
  5. Step 5: Solve for x
    x = 487,790,496,400/323,398
  6. Step 6: Final answer
    x = 1,508,328.74

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.