Home / 3,131.26-4,696.82-939.94

Finding the Fourth Proportional to 3,131.26, 4,696.82 and 939.94

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Solution

The fourth proportional to 3,131.26, 4,696.82 and 939.94 is: 1,409.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.26 : 4,696.82 = 939.94 : x
  2. Step 2: Convert to fraction form
    3,131.26/4,696.82 = 939.94/x
  3. Step 3: Cross multiply
    3,131.26x = 4,696.82 × 939.94
  4. Step 4: Simplify right side
    3,131.26x = 4,414,728.99
  5. Step 5: Solve for x
    x = 4,414,728.99/3,131.26
  6. Step 6: Final answer
    x = 1,409.89

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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.