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Finding the Third Proportional to 836 and 2,156

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Solution

The third proportional to 836 and 2,156 is: 5,560.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    836 : 2,156 = 2,156 : x
  2. Step 2: Convert to fraction form
    836/2,156 = 2,156/x
  3. Step 3: Cross multiply
    836x = 2,156 × 2,156
  4. Step 4: Simplify right side
    836x = 4,648,336
  5. Step 5: Solve for x
    x = 4,648,336/836
  6. Step 6: Final answer
    x = 5,560.21

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Why These Related Problems?

These problems maintain the same ratio (2.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.