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Finding the Third Proportional to 636,372 and 891,990

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Solution

The third proportional to 636,372 and 891,990 is: 1,250,284.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,372 : 891,990 = 891,990 : x
  2. Step 2: Convert to fraction form
    636,372/891,990 = 891,990/x
  3. Step 3: Cross multiply
    636,372x = 891,990 × 891,990
  4. Step 4: Simplify right side
    636,372x = 795,646,160,100
  5. Step 5: Solve for x
    x = 795,646,160,100/636,372
  6. Step 6: Final answer
    x = 1,250,284.68

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.