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Finding the Third Proportional to 459,111 and 991,993

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Solution

The third proportional to 459,111 and 991,993 is: 2,143,381.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,111 : 991,993 = 991,993 : x
  2. Step 2: Convert to fraction form
    459,111/991,993 = 991,993/x
  3. Step 3: Cross multiply
    459,111x = 991,993 × 991,993
  4. Step 4: Simplify right side
    459,111x = 984,050,112,049
  5. Step 5: Solve for x
    x = 984,050,112,049/459,111
  6. Step 6: Final answer
    x = 2,143,381.69

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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.