Home / 3,180.78-4,390.95-2,003.58

Finding the Fourth Proportional to 3,180.78, 4,390.95 and 2,003.58

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Solution

The fourth proportional to 3,180.78, 4,390.95 and 2,003.58 is: 2,765.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,180.78 : 4,390.95 = 2,003.58 : x
  2. Step 2: Convert to fraction form
    3,180.78/4,390.95 = 2,003.58/x
  3. Step 3: Cross multiply
    3,180.78x = 4,390.95 × 2,003.58
  4. Step 4: Simplify right side
    3,180.78x = 8,797,619.60
  5. Step 5: Solve for x
    x = 8,797,619.60/3,180.78
  6. Step 6: Final answer
    x = 2,765.87

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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.