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Finding the Third Proportional to 905,328 and 1,991,440

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Solution

The third proportional to 905,328 and 1,991,440 is: 4,380,548.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,328 : 1,991,440 = 1,991,440 : x
  2. Step 2: Convert to fraction form
    905,328/1,991,440 = 1,991,440/x
  3. Step 3: Cross multiply
    905,328x = 1,991,440 × 1,991,440
  4. Step 4: Simplify right side
    905,328x = 3,965,833,273,600
  5. Step 5: Solve for x
    x = 3,965,833,273,600/905,328
  6. Step 6: Final answer
    x = 4,380,548.57

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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.