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Finding the Third Proportional to 2,127.75 and 3,178.75

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Solution

The third proportional to 2,127.75 and 3,178.75 is: 4,748.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.75 : 3,178.75 = 3,178.75 : x
  2. Step 2: Convert to fraction form
    2,127.75/3,178.75 = 3,178.75/x
  3. Step 3: Cross multiply
    2,127.75x = 3,178.75 × 3,178.75
  4. Step 4: Simplify right side
    2,127.75x = 10,104,451.56
  5. Step 5: Solve for x
    x = 10,104,451.56/2,127.75
  6. Step 6: Final answer
    x = 4,748.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.