Home / 3,247.80-4,481.58-1,921.20

Finding the Fourth Proportional to 3,247.80, 4,481.58 and 1,921.20

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Solution

The fourth proportional to 3,247.80, 4,481.58 and 1,921.20 is: 2,651.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,247.80 : 4,481.58 = 1,921.20 : x
  2. Step 2: Convert to fraction form
    3,247.80/4,481.58 = 1,921.20/x
  3. Step 3: Cross multiply
    3,247.80x = 4,481.58 × 1,921.20
  4. Step 4: Simplify right side
    3,247.80x = 8,610,011.50
  5. Step 5: Solve for x
    x = 8,610,011.50/3,247.80
  6. Step 6: Final answer
    x = 2,651.03

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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.