Home / 3,405.11-5,109.82-1,213.79

Finding the Fourth Proportional to 3,405.11, 5,109.82 and 1,213.79

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Solution

The fourth proportional to 3,405.11, 5,109.82 and 1,213.79 is: 1,821.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.11 : 5,109.82 = 1,213.79 : x
  2. Step 2: Convert to fraction form
    3,405.11/5,109.82 = 1,213.79/x
  3. Step 3: Cross multiply
    3,405.11x = 5,109.82 × 1,213.79
  4. Step 4: Simplify right side
    3,405.11x = 6,202,219.83
  5. Step 5: Solve for x
    x = 6,202,219.83/3,405.11
  6. Step 6: Final answer
    x = 1,821.45

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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.