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Finding the Third Proportional to 762.89 and 1,640.67

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Solution

The third proportional to 762.89 and 1,640.67 is: 3,528.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.89 : 1,640.67 = 1,640.67 : x
  2. Step 2: Convert to fraction form
    762.89/1,640.67 = 1,640.67/x
  3. Step 3: Cross multiply
    762.89x = 1,640.67 × 1,640.67
  4. Step 4: Simplify right side
    762.89x = 2,691,804.20
  5. Step 5: Solve for x
    x = 2,691,804.20/762.89
  6. Step 6: Final answer
    x = 3,528.43

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.