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Finding the Third Proportional to 218,713 and 469,988

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Solution

The third proportional to 218,713 and 469,988 is: 1,009,947.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,713 : 469,988 = 469,988 : x
  2. Step 2: Convert to fraction form
    218,713/469,988 = 469,988/x
  3. Step 3: Cross multiply
    218,713x = 469,988 × 469,988
  4. Step 4: Simplify right side
    218,713x = 220,888,720,144
  5. Step 5: Solve for x
    x = 220,888,720,144/218,713
  6. Step 6: Final answer
    x = 1,009,947.83

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.