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Finding the Fourth Proportional to 2,694.51, 4,040.46 and 939.47

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Solution

The fourth proportional to 2,694.51, 4,040.46 and 939.47 is: 1,408.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,694.51 : 4,040.46 = 939.47 : x
  2. Step 2: Convert to fraction form
    2,694.51/4,040.46 = 939.47/x
  3. Step 3: Cross multiply
    2,694.51x = 4,040.46 × 939.47
  4. Step 4: Simplify right side
    2,694.51x = 3,795,870.75
  5. Step 5: Solve for x
    x = 3,795,870.75/2,694.51
  6. Step 6: Final answer
    x = 1,408.74

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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.