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Finding the Third Proportional to 3,078 and 3,330

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Solution

The third proportional to 3,078 and 3,330 is: 3,602.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078 : 3,330 = 3,330 : x
  2. Step 2: Convert to fraction form
    3,078/3,330 = 3,330/x
  3. Step 3: Cross multiply
    3,078x = 3,330 × 3,330
  4. Step 4: Simplify right side
    3,078x = 11,088,900
  5. Step 5: Solve for x
    x = 11,088,900/3,078
  6. Step 6: Final answer
    x = 3,602.63

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.