Home / 3,405.06-5,107.85-939.86

Finding the Fourth Proportional to 3,405.06, 5,107.85 and 939.86

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Solution

The fourth proportional to 3,405.06, 5,107.85 and 939.86 is: 1,409.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.06 : 5,107.85 = 939.86 : x
  2. Step 2: Convert to fraction form
    3,405.06/5,107.85 = 939.86/x
  3. Step 3: Cross multiply
    3,405.06x = 5,107.85 × 939.86
  4. Step 4: Simplify right side
    3,405.06x = 4,800,633.66
  5. Step 5: Solve for x
    x = 4,800,633.66/3,405.06
  6. Step 6: Final answer
    x = 1,409.85

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1.5x scale

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.