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Finding the Third Proportional to 419,616 and 665,460

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Solution

The third proportional to 419,616 and 665,460 is: 1,055,338.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,616 : 665,460 = 665,460 : x
  2. Step 2: Convert to fraction form
    419,616/665,460 = 665,460/x
  3. Step 3: Cross multiply
    419,616x = 665,460 × 665,460
  4. Step 4: Simplify right side
    419,616x = 442,837,011,600
  5. Step 5: Solve for x
    x = 442,837,011,600/419,616
  6. Step 6: Final answer
    x = 1,055,338.72

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.