Home / 3,143.20-4,707.60-1,976.80

Finding the Fourth Proportional to 3,143.20, 4,707.60 and 1,976.80

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Solution

The fourth proportional to 3,143.20, 4,707.60 and 1,976.80 is: 2,960.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,143.20 : 4,707.60 = 1,976.80 : x
  2. Step 2: Convert to fraction form
    3,143.20/4,707.60 = 1,976.80/x
  3. Step 3: Cross multiply
    3,143.20x = 4,707.60 × 1,976.80
  4. Step 4: Simplify right side
    3,143.20x = 9,305,983.68
  5. Step 5: Solve for x
    x = 9,305,983.68/3,143.20
  6. Step 6: Final answer
    x = 2,960.67

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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.