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Finding the Third Proportional to 3,990 and 6,152

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Solution

The third proportional to 3,990 and 6,152 is: 9,485.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990 : 6,152 = 6,152 : x
  2. Step 2: Convert to fraction form
    3,990/6,152 = 6,152/x
  3. Step 3: Cross multiply
    3,990x = 6,152 × 6,152
  4. Step 4: Simplify right side
    3,990x = 37,847,104
  5. Step 5: Solve for x
    x = 37,847,104/3,990
  6. Step 6: Final answer
    x = 9,485.49

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.