Home / 3,131.92-4,322.18-1,805.80

Finding the Fourth Proportional to 3,131.92, 4,322.18 and 1,805.80

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Solution

The fourth proportional to 3,131.92, 4,322.18 and 1,805.80 is: 2,492.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.92 : 4,322.18 = 1,805.80 : x
  2. Step 2: Convert to fraction form
    3,131.92/4,322.18 = 1,805.80/x
  3. Step 3: Cross multiply
    3,131.92x = 4,322.18 × 1,805.80
  4. Step 4: Simplify right side
    3,131.92x = 7,804,992.64
  5. Step 5: Solve for x
    x = 7,804,992.64/3,131.92
  6. Step 6: Final answer
    x = 2,492.08

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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.