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Finding the Third Proportional to 972 and 2,631

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Solution

The third proportional to 972 and 2,631 is: 7,121.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    972 : 2,631 = 2,631 : x
  2. Step 2: Convert to fraction form
    972/2,631 = 2,631/x
  3. Step 3: Cross multiply
    972x = 2,631 × 2,631
  4. Step 4: Simplify right side
    972x = 6,922,161
  5. Step 5: Solve for x
    x = 6,922,161/972
  6. Step 6: Final answer
    x = 7,121.56

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Why These Related Problems?

These problems maintain the same ratio (2.71) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.