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Finding the Fourth Proportional to 2,626.84, 3,939.11 and 1,393.98

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Solution

The fourth proportional to 2,626.84, 3,939.11 and 1,393.98 is: 2,090.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,626.84 : 3,939.11 = 1,393.98 : x
  2. Step 2: Convert to fraction form
    2,626.84/3,939.11 = 1,393.98/x
  3. Step 3: Cross multiply
    2,626.84x = 3,939.11 × 1,393.98
  4. Step 4: Simplify right side
    2,626.84x = 5,491,040.56
  5. Step 5: Solve for x
    x = 5,491,040.56/2,626.84
  6. Step 6: Final answer
    x = 2,090.36

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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.