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Finding the Third Proportional to 381,640 and 828,890

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Solution

The third proportional to 381,640 and 828,890 is: 1,800,279.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,640 : 828,890 = 828,890 : x
  2. Step 2: Convert to fraction form
    381,640/828,890 = 828,890/x
  3. Step 3: Cross multiply
    381,640x = 828,890 × 828,890
  4. Step 4: Simplify right side
    381,640x = 687,058,632,100
  5. Step 5: Solve for x
    x = 687,058,632,100/381,640
  6. Step 6: Final answer
    x = 1,800,279.40

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.