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Finding the Third Proportional to 715,421 and 1,555,087

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Solution

The third proportional to 715,421 and 1,555,087 is: 3,380,241.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,421 : 1,555,087 = 1,555,087 : x
  2. Step 2: Convert to fraction form
    715,421/1,555,087 = 1,555,087/x
  3. Step 3: Cross multiply
    715,421x = 1,555,087 × 1,555,087
  4. Step 4: Simplify right side
    715,421x = 2,418,295,577,569
  5. Step 5: Solve for x
    x = 2,418,295,577,569/715,421
  6. Step 6: Final answer
    x = 3,380,241.25

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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.