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Finding the Fourth Proportional to 2,659.70, 3,992.07 and 1,273.79

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Solution

The fourth proportional to 2,659.70, 3,992.07 and 1,273.79 is: 1,911.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,659.70 : 3,992.07 = 1,273.79 : x
  2. Step 2: Convert to fraction form
    2,659.70/3,992.07 = 1,273.79/x
  3. Step 3: Cross multiply
    2,659.70x = 3,992.07 × 1,273.79
  4. Step 4: Simplify right side
    2,659.70x = 5,085,058.85
  5. Step 5: Solve for x
    x = 5,085,058.85/2,659.70
  6. Step 6: Final answer
    x = 1,911.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.