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Finding the Third Proportional to 977 and 2,131

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Solution

The third proportional to 977 and 2,131 is: 4,648.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    977 : 2,131 = 2,131 : x
  2. Step 2: Convert to fraction form
    977/2,131 = 2,131/x
  3. Step 3: Cross multiply
    977x = 2,131 × 2,131
  4. Step 4: Simplify right side
    977x = 4,541,161
  5. Step 5: Solve for x
    x = 4,541,161/977
  6. Step 6: Final answer
    x = 4,648.07

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.