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Finding the Third Proportional to 999,621 and 2,159,136

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Solution

The third proportional to 999,621 and 2,159,136 is: 4,663,635.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,621 : 2,159,136 = 2,159,136 : x
  2. Step 2: Convert to fraction form
    999,621/2,159,136 = 2,159,136/x
  3. Step 3: Cross multiply
    999,621x = 2,159,136 × 2,159,136
  4. Step 4: Simplify right side
    999,621x = 4,661,868,266,496
  5. Step 5: Solve for x
    x = 4,661,868,266,496/999,621
  6. Step 6: Final answer
    x = 4,663,635.78

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.