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Finding the Third Proportional to 3,078 and 4,686

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Solution

The third proportional to 3,078 and 4,686 is: 7,134.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078 : 4,686 = 4,686 : x
  2. Step 2: Convert to fraction form
    3,078/4,686 = 4,686/x
  3. Step 3: Cross multiply
    3,078x = 4,686 × 4,686
  4. Step 4: Simplify right side
    3,078x = 21,958,596
  5. Step 5: Solve for x
    x = 21,958,596/3,078
  6. Step 6: Final answer
    x = 7,134.05

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.