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Finding the Third Proportional to 121,212 and 263,787

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Solution

The third proportional to 121,212 and 263,787 is: 574,065.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,212 : 263,787 = 263,787 : x
  2. Step 2: Convert to fraction form
    121,212/263,787 = 263,787/x
  3. Step 3: Cross multiply
    121,212x = 263,787 × 263,787
  4. Step 4: Simplify right side
    121,212x = 69,583,581,369
  5. Step 5: Solve for x
    x = 69,583,581,369/121,212
  6. Step 6: Final answer
    x = 574,065.12

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.