Home / 3,186.61-4,778.88-2,209.75

Finding the Fourth Proportional to 3,186.61, 4,778.88 and 2,209.75

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Solution

The fourth proportional to 3,186.61, 4,778.88 and 2,209.75 is: 3,313.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,186.61 : 4,778.88 = 2,209.75 : x
  2. Step 2: Convert to fraction form
    3,186.61/4,778.88 = 2,209.75/x
  3. Step 3: Cross multiply
    3,186.61x = 4,778.88 × 2,209.75
  4. Step 4: Simplify right side
    3,186.61x = 10,560,130.08
  5. Step 5: Solve for x
    x = 10,560,130.08/3,186.61
  6. Step 6: Final answer
    x = 3,313.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.