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Finding the Third Proportional to 4,407 and 7,089

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Solution

The third proportional to 4,407 and 7,089 is: 11,403.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,407 : 7,089 = 7,089 : x
  2. Step 2: Convert to fraction form
    4,407/7,089 = 7,089/x
  3. Step 3: Cross multiply
    4,407x = 7,089 × 7,089
  4. Step 4: Simplify right side
    4,407x = 50,253,921
  5. Step 5: Solve for x
    x = 50,253,921/4,407
  6. Step 6: Final answer
    x = 11,403.20

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.