Home / 3,189.47-4,778.10-2,672.78

Finding the Fourth Proportional to 3,189.47, 4,778.10 and 2,672.78

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Solution

The fourth proportional to 3,189.47, 4,778.10 and 2,672.78 is: 4,004.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189.47 : 4,778.10 = 2,672.78 : x
  2. Step 2: Convert to fraction form
    3,189.47/4,778.10 = 2,672.78/x
  3. Step 3: Cross multiply
    3,189.47x = 4,778.10 × 2,672.78
  4. Step 4: Simplify right side
    3,189.47x = 12,770,786.23
  5. Step 5: Solve for x
    x = 12,770,786.23/3,189.47
  6. Step 6: Final answer
    x = 4,004.05

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1.5x scale

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.