Home / 3,619.12-5,427.49-1,278.70

Finding the Fourth Proportional to 3,619.12, 5,427.49 and 1,278.70

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Solution

The fourth proportional to 3,619.12, 5,427.49 and 1,278.70 is: 1,917.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.12 : 5,427.49 = 1,278.70 : x
  2. Step 2: Convert to fraction form
    3,619.12/5,427.49 = 1,278.70/x
  3. Step 3: Cross multiply
    3,619.12x = 5,427.49 × 1,278.70
  4. Step 4: Simplify right side
    3,619.12x = 6,940,131.46
  5. Step 5: Solve for x
    x = 6,940,131.46/3,619.12
  6. Step 6: Final answer
    x = 1,917.63

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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.