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Finding the Third Proportional to 419,572 and 645,285

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Solution

The third proportional to 419,572 and 645,285 is: 992,422.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,572 : 645,285 = 645,285 : x
  2. Step 2: Convert to fraction form
    419,572/645,285 = 645,285/x
  3. Step 3: Cross multiply
    419,572x = 645,285 × 645,285
  4. Step 4: Simplify right side
    419,572x = 416,392,731,225
  5. Step 5: Solve for x
    x = 416,392,731,225/419,572
  6. Step 6: Final answer
    x = 992,422.59

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.