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Finding the Third Proportional to 4,120 and 5,664

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Solution

The third proportional to 4,120 and 5,664 is: 7,786.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,120 : 5,664 = 5,664 : x
  2. Step 2: Convert to fraction form
    4,120/5,664 = 5,664/x
  3. Step 3: Cross multiply
    4,120x = 5,664 × 5,664
  4. Step 4: Simplify right side
    4,120x = 32,080,896
  5. Step 5: Solve for x
    x = 32,080,896/4,120
  6. Step 6: Final answer
    x = 7,786.63

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.