Home / 3,121.26-4,679.40-1,803.51

Finding the Fourth Proportional to 3,121.26, 4,679.40 and 1,803.51

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Solution

The fourth proportional to 3,121.26, 4,679.40 and 1,803.51 is: 2,703.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.26 : 4,679.40 = 1,803.51 : x
  2. Step 2: Convert to fraction form
    3,121.26/4,679.40 = 1,803.51/x
  3. Step 3: Cross multiply
    3,121.26x = 4,679.40 × 1,803.51
  4. Step 4: Simplify right side
    3,121.26x = 8,439,344.69
  5. Step 5: Solve for x
    x = 8,439,344.69/3,121.26
  6. Step 6: Final answer
    x = 2,703.83

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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.