Home / 3,942.80-5,909.40-1,749.20

Finding the Fourth Proportional to 3,942.80, 5,909.40 and 1,749.20

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Solution

The fourth proportional to 3,942.80, 5,909.40 and 1,749.20 is: 2,621.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,942.80 : 5,909.40 = 1,749.20 : x
  2. Step 2: Convert to fraction form
    3,942.80/5,909.40 = 1,749.20/x
  3. Step 3: Cross multiply
    3,942.80x = 5,909.40 × 1,749.20
  4. Step 4: Simplify right side
    3,942.80x = 10,336,722.48
  5. Step 5: Solve for x
    x = 10,336,722.48/3,942.80
  6. Step 6: Final answer
    x = 2,621.67

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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.