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Finding the Third Proportional to 320,103 and 687,652

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Solution

The third proportional to 320,103 and 687,652 is: 1,477,228.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,103 : 687,652 = 687,652 : x
  2. Step 2: Convert to fraction form
    320,103/687,652 = 687,652/x
  3. Step 3: Cross multiply
    320,103x = 687,652 × 687,652
  4. Step 4: Simplify right side
    320,103x = 472,865,273,104
  5. Step 5: Solve for x
    x = 472,865,273,104/320,103
  6. Step 6: Final answer
    x = 1,477,228.50

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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.