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Finding the Third Proportional to 186,990 and 411,363

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Solution

The third proportional to 186,990 and 411,363 is: 904,965.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,990 : 411,363 = 411,363 : x
  2. Step 2: Convert to fraction form
    186,990/411,363 = 411,363/x
  3. Step 3: Cross multiply
    186,990x = 411,363 × 411,363
  4. Step 4: Simplify right side
    186,990x = 169,219,517,769
  5. Step 5: Solve for x
    x = 169,219,517,769/186,990
  6. Step 6: Final answer
    x = 904,965.60

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.