Home / 3,131.06-4,321.82-1,805.64

Finding the Fourth Proportional to 3,131.06, 4,321.82 and 1,805.64

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Solution

The fourth proportional to 3,131.06, 4,321.82 and 1,805.64 is: 2,492.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.06 : 4,321.82 = 1,805.64 : x
  2. Step 2: Convert to fraction form
    3,131.06/4,321.82 = 1,805.64/x
  3. Step 3: Cross multiply
    3,131.06x = 4,321.82 × 1,805.64
  4. Step 4: Simplify right side
    3,131.06x = 7,803,651.06
  5. Step 5: Solve for x
    x = 7,803,651.06/3,131.06
  6. Step 6: Final answer
    x = 2,492.34

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1.5x scale

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.