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Finding the Third Proportional to 3,078 and 7,155

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Solution

The third proportional to 3,078 and 7,155 is: 16,632.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078 : 7,155 = 7,155 : x
  2. Step 2: Convert to fraction form
    3,078/7,155 = 7,155/x
  3. Step 3: Cross multiply
    3,078x = 7,155 × 7,155
  4. Step 4: Simplify right side
    3,078x = 51,194,025
  5. Step 5: Solve for x
    x = 51,194,025/3,078
  6. Step 6: Final answer
    x = 16,632.24

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Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.