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Finding the Third Proportional to 936,579 and 1,989,780

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Solution

The third proportional to 936,579 and 1,989,780 is: 4,227,325.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    936,579 : 1,989,780 = 1,989,780 : x
  2. Step 2: Convert to fraction form
    936,579/1,989,780 = 1,989,780/x
  3. Step 3: Cross multiply
    936,579x = 1,989,780 × 1,989,780
  4. Step 4: Simplify right side
    936,579x = 3,959,224,448,400
  5. Step 5: Solve for x
    x = 3,959,224,448,400/936,579
  6. Step 6: Final answer
    x = 4,227,325.67

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.