Home / 2,911.55-4,367.39-720.29

Finding the Fourth Proportional to 2,911.55, 4,367.39 and 720.29

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Solution

The fourth proportional to 2,911.55, 4,367.39 and 720.29 is: 1,080.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.55 : 4,367.39 = 720.29 : x
  2. Step 2: Convert to fraction form
    2,911.55/4,367.39 = 720.29/x
  3. Step 3: Cross multiply
    2,911.55x = 4,367.39 × 720.29
  4. Step 4: Simplify right side
    2,911.55x = 3,145,794.66
  5. Step 5: Solve for x
    x = 3,145,794.66/2,911.55
  6. Step 6: Final answer
    x = 1,080.46

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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.