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Finding the Third Proportional to 212,726 and 329,345

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Solution

The third proportional to 212,726 and 329,345 is: 509,895.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,726 : 329,345 = 329,345 : x
  2. Step 2: Convert to fraction form
    212,726/329,345 = 329,345/x
  3. Step 3: Cross multiply
    212,726x = 329,345 × 329,345
  4. Step 4: Simplify right side
    212,726x = 108,468,129,025
  5. Step 5: Solve for x
    x = 108,468,129,025/212,726
  6. Step 6: Final answer
    x = 509,895.96

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.