Home / 3,161.82-4,739.79-1,405.90

Finding the Fourth Proportional to 3,161.82, 4,739.79 and 1,405.90

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Solution

The fourth proportional to 3,161.82, 4,739.79 and 1,405.90 is: 2,107.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,161.82 : 4,739.79 = 1,405.90 : x
  2. Step 2: Convert to fraction form
    3,161.82/4,739.79 = 1,405.90/x
  3. Step 3: Cross multiply
    3,161.82x = 4,739.79 × 1,405.90
  4. Step 4: Simplify right side
    3,161.82x = 6,663,670.76
  5. Step 5: Solve for x
    x = 6,663,670.76/3,161.82
  6. Step 6: Final answer
    x = 2,107.54

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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.