Home / 3,131.25-4,322.21-1,805.47

Finding the Fourth Proportional to 3,131.25, 4,322.21 and 1,805.47

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Solution

The fourth proportional to 3,131.25, 4,322.21 and 1,805.47 is: 2,492.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.25 : 4,322.21 = 1,805.47 : x
  2. Step 2: Convert to fraction form
    3,131.25/4,322.21 = 1,805.47/x
  3. Step 3: Cross multiply
    3,131.25x = 4,322.21 × 1,805.47
  4. Step 4: Simplify right side
    3,131.25x = 7,803,620.49
  5. Step 5: Solve for x
    x = 7,803,620.49/3,131.25
  6. Step 6: Final answer
    x = 2,492.17

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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.