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Finding the Third Proportional to 6,640 and 7,664

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Solution

The third proportional to 6,640 and 7,664 is: 8,845.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640 : 7,664 = 7,664 : x
  2. Step 2: Convert to fraction form
    6,640/7,664 = 7,664/x
  3. Step 3: Cross multiply
    6,640x = 7,664 × 7,664
  4. Step 4: Simplify right side
    6,640x = 58,736,896
  5. Step 5: Solve for x
    x = 58,736,896/6,640
  6. Step 6: Final answer
    x = 8,845.92

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.