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Finding the Third Proportional to 131,529 and 289,869

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Solution

The third proportional to 131,529 and 289,869 is: 638,825.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,529 : 289,869 = 289,869 : x
  2. Step 2: Convert to fraction form
    131,529/289,869 = 289,869/x
  3. Step 3: Cross multiply
    131,529x = 289,869 × 289,869
  4. Step 4: Simplify right side
    131,529x = 84,024,037,161
  5. Step 5: Solve for x
    x = 84,024,037,161/131,529
  6. Step 6: Final answer
    x = 638,825.18

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.