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Finding the Third Proportional to 860,679 and 1,891,215

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Solution

The third proportional to 860,679 and 1,891,215 is: 4,155,665.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,679 : 1,891,215 = 1,891,215 : x
  2. Step 2: Convert to fraction form
    860,679/1,891,215 = 1,891,215/x
  3. Step 3: Cross multiply
    860,679x = 1,891,215 × 1,891,215
  4. Step 4: Simplify right side
    860,679x = 3,576,694,176,225
  5. Step 5: Solve for x
    x = 3,576,694,176,225/860,679
  6. Step 6: Final answer
    x = 4,155,665.67

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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.