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Finding the Fourth Proportional to 2,778.44, 4,167.90 and 726.44

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Solution

The fourth proportional to 2,778.44, 4,167.90 and 726.44 is: 1,089.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.44 : 4,167.90 = 726.44 : x
  2. Step 2: Convert to fraction form
    2,778.44/4,167.90 = 726.44/x
  3. Step 3: Cross multiply
    2,778.44x = 4,167.90 × 726.44
  4. Step 4: Simplify right side
    2,778.44x = 3,027,729.28
  5. Step 5: Solve for x
    x = 3,027,729.28/2,778.44
  6. Step 6: Final answer
    x = 1,089.72

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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.