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Finding the Third Proportional to 3,708 and 5,415

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Solution

The third proportional to 3,708 and 5,415 is: 7,907.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,708 : 5,415 = 5,415 : x
  2. Step 2: Convert to fraction form
    3,708/5,415 = 5,415/x
  3. Step 3: Cross multiply
    3,708x = 5,415 × 5,415
  4. Step 4: Simplify right side
    3,708x = 29,322,225
  5. Step 5: Solve for x
    x = 29,322,225/3,708
  6. Step 6: Final answer
    x = 7,907.83

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.