Home / 3,189.12-4,396.80-2,305.12

Finding the Fourth Proportional to 3,189.12, 4,396.80 and 2,305.12

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Solution

The fourth proportional to 3,189.12, 4,396.80 and 2,305.12 is: 3,178.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189.12 : 4,396.80 = 2,305.12 : x
  2. Step 2: Convert to fraction form
    3,189.12/4,396.80 = 2,305.12/x
  3. Step 3: Cross multiply
    3,189.12x = 4,396.80 × 2,305.12
  4. Step 4: Simplify right side
    3,189.12x = 10,135,151.62
  5. Step 5: Solve for x
    x = 10,135,151.62/3,189.12
  6. Step 6: Final answer
    x = 3,178.04

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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.