Home / 3,131.47-4,322.21-1,805.97

Finding the Fourth Proportional to 3,131.47, 4,322.21 and 1,805.97

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Solution

The fourth proportional to 3,131.47, 4,322.21 and 1,805.97 is: 2,492.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.47 : 4,322.21 = 1,805.97 : x
  2. Step 2: Convert to fraction form
    3,131.47/4,322.21 = 1,805.97/x
  3. Step 3: Cross multiply
    3,131.47x = 4,322.21 × 1,805.97
  4. Step 4: Simplify right side
    3,131.47x = 7,805,772.56
  5. Step 5: Solve for x
    x = 7,805,772.56/3,131.47
  6. Step 6: Final answer
    x = 2,492.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.