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Finding the Third Proportional to 3,872.81 and 5,459.91

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Solution

The third proportional to 3,872.81 and 5,459.91 is: 7,697.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,872.81 : 5,459.91 = 5,459.91 : x
  2. Step 2: Convert to fraction form
    3,872.81/5,459.91 = 5,459.91/x
  3. Step 3: Cross multiply
    3,872.81x = 5,459.91 × 5,459.91
  4. Step 4: Simplify right side
    3,872.81x = 29,810,576.26
  5. Step 5: Solve for x
    x = 29,810,576.26/3,872.81
  6. Step 6: Final answer
    x = 7,697.40

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.