Home / 3,405.08-5,102.70-2,105.80

Finding the Fourth Proportional to 3,405.08, 5,102.70 and 2,105.80

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Solution

The fourth proportional to 3,405.08, 5,102.70 and 2,105.80 is: 3,155.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.08 : 5,102.70 = 2,105.80 : x
  2. Step 2: Convert to fraction form
    3,405.08/5,102.70 = 2,105.80/x
  3. Step 3: Cross multiply
    3,405.08x = 5,102.70 × 2,105.80
  4. Step 4: Simplify right side
    3,405.08x = 10,745,265.66
  5. Step 5: Solve for x
    x = 10,745,265.66/3,405.08
  6. Step 6: Final answer
    x = 3,155.66

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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.