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Finding the Fourth Proportional to 2,687.22, 4,029.62 and 1,865.88

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Solution

The fourth proportional to 2,687.22, 4,029.62 and 1,865.88 is: 2,797.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.22 : 4,029.62 = 1,865.88 : x
  2. Step 2: Convert to fraction form
    2,687.22/4,029.62 = 1,865.88/x
  3. Step 3: Cross multiply
    2,687.22x = 4,029.62 × 1,865.88
  4. Step 4: Simplify right side
    2,687.22x = 7,518,778.04
  5. Step 5: Solve for x
    x = 7,518,778.04/2,687.22
  6. Step 6: Final answer
    x = 2,797.98

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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.