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Finding the Fourth Proportional to 3,939.44, 5,910.60 and 1,342.64

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Solution

The fourth proportional to 3,939.44, 5,910.60 and 1,342.64 is: 2,014.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.44 : 5,910.60 = 1,342.64 : x
  2. Step 2: Convert to fraction form
    3,939.44/5,910.60 = 1,342.64/x
  3. Step 3: Cross multiply
    3,939.44x = 5,910.60 × 1,342.64
  4. Step 4: Simplify right side
    3,939.44x = 7,935,807.98
  5. Step 5: Solve for x
    x = 7,935,807.98/3,939.44
  6. Step 6: Final answer
    x = 2,014.45

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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.