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Finding the Third Proportional to 186,931 and 405,412

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Solution

The third proportional to 186,931 and 405,412 is: 879,248.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,931 : 405,412 = 405,412 : x
  2. Step 2: Convert to fraction form
    186,931/405,412 = 405,412/x
  3. Step 3: Cross multiply
    186,931x = 405,412 × 405,412
  4. Step 4: Simplify right side
    186,931x = 164,358,889,744
  5. Step 5: Solve for x
    x = 164,358,889,744/186,931
  6. Step 6: Final answer
    x = 879,248.97

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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.