Home / 2,619.36-3,928.24-1,080

Finding the Fourth Proportional to 2,619.36, 3,928.24 and 1,080

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Solution

The fourth proportional to 2,619.36, 3,928.24 and 1,080 is: 1,619.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619.36 : 3,928.24 = 1,080 : x
  2. Step 2: Convert to fraction form
    2,619.36/3,928.24 = 1,080/x
  3. Step 3: Cross multiply
    2,619.36x = 3,928.24 × 1,080
  4. Step 4: Simplify right side
    2,619.36x = 4,242,499.20
  5. Step 5: Solve for x
    x = 4,242,499.20/2,619.36
  6. Step 6: Final answer
    x = 1,619.67

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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.