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Finding the Third Proportional to 120,276 and 214,308

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Solution

The third proportional to 120,276 and 214,308 is: 381,854.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,276 : 214,308 = 214,308 : x
  2. Step 2: Convert to fraction form
    120,276/214,308 = 214,308/x
  3. Step 3: Cross multiply
    120,276x = 214,308 × 214,308
  4. Step 4: Simplify right side
    120,276x = 45,927,918,864
  5. Step 5: Solve for x
    x = 45,927,918,864/120,276
  6. Step 6: Final answer
    x = 381,854.39

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Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.