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Finding the Third Proportional to 186,812 and 256,890

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Solution

The third proportional to 186,812 and 256,890 is: 353,256.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,812 : 256,890 = 256,890 : x
  2. Step 2: Convert to fraction form
    186,812/256,890 = 256,890/x
  3. Step 3: Cross multiply
    186,812x = 256,890 × 256,890
  4. Step 4: Simplify right side
    186,812x = 65,992,472,100
  5. Step 5: Solve for x
    x = 65,992,472,100/186,812
  6. Step 6: Final answer
    x = 353,256.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.