Home / 3,378.24-4,660.74-1,980.72

Finding the Fourth Proportional to 3,378.24, 4,660.74 and 1,980.72

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Solution

The fourth proportional to 3,378.24, 4,660.74 and 1,980.72 is: 2,732.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,378.24 : 4,660.74 = 1,980.72 : x
  2. Step 2: Convert to fraction form
    3,378.24/4,660.74 = 1,980.72/x
  3. Step 3: Cross multiply
    3,378.24x = 4,660.74 × 1,980.72
  4. Step 4: Simplify right side
    3,378.24x = 9,231,620.93
  5. Step 5: Solve for x
    x = 9,231,620.93/3,378.24
  6. Step 6: Final answer
    x = 2,732.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.