Home / 3,131.19-4,696.79-1,375.78

Finding the Fourth Proportional to 3,131.19, 4,696.79 and 1,375.78

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Solution

The fourth proportional to 3,131.19, 4,696.79 and 1,375.78 is: 2,063.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.19 : 4,696.79 = 1,375.78 : x
  2. Step 2: Convert to fraction form
    3,131.19/4,696.79 = 1,375.78/x
  3. Step 3: Cross multiply
    3,131.19x = 4,696.79 × 1,375.78
  4. Step 4: Simplify right side
    3,131.19x = 6,461,731.13
  5. Step 5: Solve for x
    x = 6,461,731.13/3,131.19
  6. Step 6: Final answer
    x = 2,063.66

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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.