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Finding the Third Proportional to 299,775.50 and 642,285

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Solution

The third proportional to 299,775.50 and 642,285 is: 1,376,129.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,775.50 : 642,285 = 642,285 : x
  2. Step 2: Convert to fraction form
    299,775.50/642,285 = 642,285/x
  3. Step 3: Cross multiply
    299,775.50x = 642,285 × 642,285
  4. Step 4: Simplify right side
    299,775.50x = 412,530,021,225
  5. Step 5: Solve for x
    x = 412,530,021,225/299,775.50
  6. Step 6: Final answer
    x = 1,376,129.87

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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.