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Finding the Fourth Proportional to 3,992.78, 5,989.18 and 1,395.72

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Solution

The fourth proportional to 3,992.78, 5,989.18 and 1,395.72 is: 2,093.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.78 : 5,989.18 = 1,395.72 : x
  2. Step 2: Convert to fraction form
    3,992.78/5,989.18 = 1,395.72/x
  3. Step 3: Cross multiply
    3,992.78x = 5,989.18 × 1,395.72
  4. Step 4: Simplify right side
    3,992.78x = 8,359,218.31
  5. Step 5: Solve for x
    x = 8,359,218.31/3,992.78
  6. Step 6: Final answer
    x = 2,093.58

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Similar ratio
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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.