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Finding the Fourth Proportional to 2,486.97, 3,431.97 and 1,367.89

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Solution

The fourth proportional to 2,486.97, 3,431.97 and 1,367.89 is: 1,887.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,486.97 : 3,431.97 = 1,367.89 : x
  2. Step 2: Convert to fraction form
    2,486.97/3,431.97 = 1,367.89/x
  3. Step 3: Cross multiply
    2,486.97x = 3,431.97 × 1,367.89
  4. Step 4: Simplify right side
    2,486.97x = 4,694,548.86
  5. Step 5: Solve for x
    x = 4,694,548.86/2,486.97
  6. Step 6: Final answer
    x = 1,887.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.