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Finding the Third Proportional to 418,620 and 668,322

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Solution

The third proportional to 418,620 and 668,322 is: 1,066,968.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,620 : 668,322 = 668,322 : x
  2. Step 2: Convert to fraction form
    418,620/668,322 = 668,322/x
  3. Step 3: Cross multiply
    418,620x = 668,322 × 668,322
  4. Step 4: Simplify right side
    418,620x = 446,654,295,684
  5. Step 5: Solve for x
    x = 446,654,295,684/418,620
  6. Step 6: Final answer
    x = 1,066,968.36

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.