Home / 3,579.40-5,367.78-1,238.80

Finding the Fourth Proportional to 3,579.40, 5,367.78 and 1,238.80

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Solution

The fourth proportional to 3,579.40, 5,367.78 and 1,238.80 is: 1,857.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,579.40 : 5,367.78 = 1,238.80 : x
  2. Step 2: Convert to fraction form
    3,579.40/5,367.78 = 1,238.80/x
  3. Step 3: Cross multiply
    3,579.40x = 5,367.78 × 1,238.80
  4. Step 4: Simplify right side
    3,579.40x = 6,649,579.03
  5. Step 5: Solve for x
    x = 6,649,579.03/3,579.40
  6. Step 6: Final answer
    x = 1,857.74

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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.