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Finding the Third Proportional to 256,887 and 409,113

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Solution

The third proportional to 256,887 and 409,113 is: 651,545.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,887 : 409,113 = 409,113 : x
  2. Step 2: Convert to fraction form
    256,887/409,113 = 409,113/x
  3. Step 3: Cross multiply
    256,887x = 409,113 × 409,113
  4. Step 4: Simplify right side
    256,887x = 167,373,446,769
  5. Step 5: Solve for x
    x = 167,373,446,769/256,887
  6. Step 6: Final answer
    x = 651,545.02

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.