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Finding the Third Proportional to 3,123 and 4,108.75

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Solution

The third proportional to 3,123 and 4,108.75 is: 5,405.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123 : 4,108.75 = 4,108.75 : x
  2. Step 2: Convert to fraction form
    3,123/4,108.75 = 4,108.75/x
  3. Step 3: Cross multiply
    3,123x = 4,108.75 × 4,108.75
  4. Step 4: Simplify right side
    3,123x = 16,881,826.56
  5. Step 5: Solve for x
    x = 16,881,826.56/3,123
  6. Step 6: Final answer
    x = 5,405.64

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.