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Finding the Fourth Proportional to 3,992.70, 5,990.22 and 1,395.84

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Solution

The fourth proportional to 3,992.70, 5,990.22 and 1,395.84 is: 2,094.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.70 : 5,990.22 = 1,395.84 : x
  2. Step 2: Convert to fraction form
    3,992.70/5,990.22 = 1,395.84/x
  3. Step 3: Cross multiply
    3,992.70x = 5,990.22 × 1,395.84
  4. Step 4: Simplify right side
    3,992.70x = 8,361,388.68
  5. Step 5: Solve for x
    x = 8,361,388.68/3,992.70
  6. Step 6: Final answer
    x = 2,094.17

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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.