Home / 1,336.21-2,004.31-720.61

Finding the Fourth Proportional to 1,336.21, 2,004.31 and 720.61

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Solution

The fourth proportional to 1,336.21, 2,004.31 and 720.61 is: 1,080.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,336.21 : 2,004.31 = 720.61 : x
  2. Step 2: Convert to fraction form
    1,336.21/2,004.31 = 720.61/x
  3. Step 3: Cross multiply
    1,336.21x = 2,004.31 × 720.61
  4. Step 4: Simplify right side
    1,336.21x = 1,444,321.72
  5. Step 5: Solve for x
    x = 1,444,321.72/1,336.21
  6. Step 6: Final answer
    x = 1,080.91

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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.