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Finding the Third Proportional to 2,640 and 4,029

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Solution

The third proportional to 2,640 and 4,029 is: 6,148.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640 : 4,029 = 4,029 : x
  2. Step 2: Convert to fraction form
    2,640/4,029 = 4,029/x
  3. Step 3: Cross multiply
    2,640x = 4,029 × 4,029
  4. Step 4: Simplify right side
    2,640x = 16,232,841
  5. Step 5: Solve for x
    x = 16,232,841/2,640
  6. Step 6: Final answer
    x = 6,148.80

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.