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Finding the Third Proportional to 103,689 and 218,445

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Solution

The third proportional to 103,689 and 218,445 is: 460,205.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,689 : 218,445 = 218,445 : x
  2. Step 2: Convert to fraction form
    103,689/218,445 = 218,445/x
  3. Step 3: Cross multiply
    103,689x = 218,445 × 218,445
  4. Step 4: Simplify right side
    103,689x = 47,718,218,025
  5. Step 5: Solve for x
    x = 47,718,218,025/103,689
  6. Step 6: Final answer
    x = 460,205.21

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.