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Finding the Third Proportional to 299,311 and 650,990

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Solution

The third proportional to 299,311 and 650,990 is: 1,415,878.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,311 : 650,990 = 650,990 : x
  2. Step 2: Convert to fraction form
    299,311/650,990 = 650,990/x
  3. Step 3: Cross multiply
    299,311x = 650,990 × 650,990
  4. Step 4: Simplify right side
    299,311x = 423,787,980,100
  5. Step 5: Solve for x
    x = 423,787,980,100/299,311
  6. Step 6: Final answer
    x = 1,415,878.40

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.