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Finding the Third Proportional to 921,690 and 1,916,955

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Solution

The third proportional to 921,690 and 1,916,955 is: 3,986,933.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,690 : 1,916,955 = 1,916,955 : x
  2. Step 2: Convert to fraction form
    921,690/1,916,955 = 1,916,955/x
  3. Step 3: Cross multiply
    921,690x = 1,916,955 × 1,916,955
  4. Step 4: Simplify right side
    921,690x = 3,674,716,472,025
  5. Step 5: Solve for x
    x = 3,674,716,472,025/921,690
  6. Step 6: Final answer
    x = 3,986,933.21

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.