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Finding the Fourth Proportional to 2,486.76, 3,431.76 and 1,367.82

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Solution

The fourth proportional to 2,486.76, 3,431.76 and 1,367.82 is: 1,887.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,486.76 : 3,431.76 = 1,367.82 : x
  2. Step 2: Convert to fraction form
    2,486.76/3,431.76 = 1,367.82/x
  3. Step 3: Cross multiply
    2,486.76x = 3,431.76 × 1,367.82
  4. Step 4: Simplify right side
    2,486.76x = 4,694,029.96
  5. Step 5: Solve for x
    x = 4,694,029.96/2,486.76
  6. Step 6: Final answer
    x = 1,887.61

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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.