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Finding the Third Proportional to 320,910.75 and 687,363.75

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Solution

The third proportional to 320,910.75 and 687,363.75 is: 1,472,275.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,910.75 : 687,363.75 = 687,363.75 : x
  2. Step 2: Convert to fraction form
    320,910.75/687,363.75 = 687,363.75/x
  3. Step 3: Cross multiply
    320,910.75x = 687,363.75 × 687,363.75
  4. Step 4: Simplify right side
    320,910.75x = 472,468,924,814.06
  5. Step 5: Solve for x
    x = 472,468,924,814.06/320,910.75
  6. Step 6: Final answer
    x = 1,472,275.16

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.