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Finding the Fourth Proportional to 2,693.81, 4,040.31 and 939.08

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Solution

The fourth proportional to 2,693.81, 4,040.31 and 939.08 is: 1,408.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,693.81 : 4,040.31 = 939.08 : x
  2. Step 2: Convert to fraction form
    2,693.81/4,040.31 = 939.08/x
  3. Step 3: Cross multiply
    2,693.81x = 4,040.31 × 939.08
  4. Step 4: Simplify right side
    2,693.81x = 3,794,174.31
  5. Step 5: Solve for x
    x = 3,794,174.31/2,693.81
  6. Step 6: Final answer
    x = 1,408.48

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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.