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Finding the Third Proportional to 1,640.74 and 3,600.42

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Solution

The third proportional to 1,640.74 and 3,600.42 is: 7,900.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.74 : 3,600.42 = 3,600.42 : x
  2. Step 2: Convert to fraction form
    1,640.74/3,600.42 = 3,600.42/x
  3. Step 3: Cross multiply
    1,640.74x = 3,600.42 × 3,600.42
  4. Step 4: Simplify right side
    1,640.74x = 12,963,037.68
  5. Step 5: Solve for x
    x = 12,963,037.68/1,640.74
  6. Step 6: Final answer
    x = 7,900.72

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.