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Finding the Third Proportional to 317,740 and 661,616

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Solution

The third proportional to 317,740 and 661,616 is: 1,377,653.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,740 : 661,616 = 661,616 : x
  2. Step 2: Convert to fraction form
    317,740/661,616 = 661,616/x
  3. Step 3: Cross multiply
    317,740x = 661,616 × 661,616
  4. Step 4: Simplify right side
    317,740x = 437,735,731,456
  5. Step 5: Solve for x
    x = 437,735,731,456/317,740
  6. Step 6: Final answer
    x = 1,377,653.84

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.