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Finding the Third Proportional to 3,870 and 4,482

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Solution

The third proportional to 3,870 and 4,482 is: 5,190.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,870 : 4,482 = 4,482 : x
  2. Step 2: Convert to fraction form
    3,870/4,482 = 4,482/x
  3. Step 3: Cross multiply
    3,870x = 4,482 × 4,482
  4. Step 4: Simplify right side
    3,870x = 20,088,324
  5. Step 5: Solve for x
    x = 20,088,324/3,870
  6. Step 6: Final answer
    x = 5,190.78

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Why These Related Problems?

These problems maintain the same ratio (1.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.