Home / 3,619.09-5,428.23-1,278.60

Finding the Fourth Proportional to 3,619.09, 5,428.23 and 1,278.60

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Solution

The fourth proportional to 3,619.09, 5,428.23 and 1,278.60 is: 1,917.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.09 : 5,428.23 = 1,278.60 : x
  2. Step 2: Convert to fraction form
    3,619.09/5,428.23 = 1,278.60/x
  3. Step 3: Cross multiply
    3,619.09x = 5,428.23 × 1,278.60
  4. Step 4: Simplify right side
    3,619.09x = 6,940,534.88
  5. Step 5: Solve for x
    x = 6,940,534.88/3,619.09
  6. Step 6: Final answer
    x = 1,917.76

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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.