Home / 3,161.62-4,739.48-1,405.70

Finding the Fourth Proportional to 3,161.62, 4,739.48 and 1,405.70

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Solution

The fourth proportional to 3,161.62, 4,739.48 and 1,405.70 is: 2,107.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,161.62 : 4,739.48 = 1,405.70 : x
  2. Step 2: Convert to fraction form
    3,161.62/4,739.48 = 1,405.70/x
  3. Step 3: Cross multiply
    3,161.62x = 4,739.48 × 1,405.70
  4. Step 4: Simplify right side
    3,161.62x = 6,662,266.85
  5. Step 5: Solve for x
    x = 6,662,266.85/3,161.62
  6. Step 6: Final answer
    x = 2,107.23

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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.