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Finding the Third Proportional to 256,194 and 409,274

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Solution

The third proportional to 256,194 and 409,274 is: 653,821.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,194 : 409,274 = 409,274 : x
  2. Step 2: Convert to fraction form
    256,194/409,274 = 409,274/x
  3. Step 3: Cross multiply
    256,194x = 409,274 × 409,274
  4. Step 4: Simplify right side
    256,194x = 167,505,207,076
  5. Step 5: Solve for x
    x = 167,505,207,076/256,194
  6. Step 6: Final answer
    x = 653,821.74

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.