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Finding the Fourth Proportional to 3,989.45, 5,984.44 and 1,356.22

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Solution

The fourth proportional to 3,989.45, 5,984.44 and 1,356.22 is: 2,034.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.45 : 5,984.44 = 1,356.22 : x
  2. Step 2: Convert to fraction form
    3,989.45/5,984.44 = 1,356.22/x
  3. Step 3: Cross multiply
    3,989.45x = 5,984.44 × 1,356.22
  4. Step 4: Simplify right side
    3,989.45x = 8,116,239.01
  5. Step 5: Solve for x
    x = 8,116,239.01/3,989.45
  6. Step 6: Final answer
    x = 2,034.42

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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.