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Finding the Third Proportional to 218,566 and 329,858

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Solution

The third proportional to 218,566 and 329,858 is: 497,818.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,566 : 329,858 = 329,858 : x
  2. Step 2: Convert to fraction form
    218,566/329,858 = 329,858/x
  3. Step 3: Cross multiply
    218,566x = 329,858 × 329,858
  4. Step 4: Simplify right side
    218,566x = 108,806,300,164
  5. Step 5: Solve for x
    x = 108,806,300,164/218,566
  6. Step 6: Final answer
    x = 497,818.97

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.