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Finding the Third Proportional to 4,555 and 7,149

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Solution

The third proportional to 4,555 and 7,149 is: 11,220.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,555 : 7,149 = 7,149 : x
  2. Step 2: Convert to fraction form
    4,555/7,149 = 7,149/x
  3. Step 3: Cross multiply
    4,555x = 7,149 × 7,149
  4. Step 4: Simplify right side
    4,555x = 51,108,201
  5. Step 5: Solve for x
    x = 51,108,201/4,555
  6. Step 6: Final answer
    x = 11,220.24

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.