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Finding the Third Proportional to 287,721 and 605,273

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Solution

The third proportional to 287,721 and 605,273 is: 1,273,300.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,721 : 605,273 = 605,273 : x
  2. Step 2: Convert to fraction form
    287,721/605,273 = 605,273/x
  3. Step 3: Cross multiply
    287,721x = 605,273 × 605,273
  4. Step 4: Simplify right side
    287,721x = 366,355,404,529
  5. Step 5: Solve for x
    x = 366,355,404,529/287,721
  6. Step 6: Final answer
    x = 1,273,300.89

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.