Home / 3,220.20-4,830.68-1,139.77

Finding the Fourth Proportional to 3,220.20, 4,830.68 and 1,139.77

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Solution

The fourth proportional to 3,220.20, 4,830.68 and 1,139.77 is: 1,709.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,220.20 : 4,830.68 = 1,139.77 : x
  2. Step 2: Convert to fraction form
    3,220.20/4,830.68 = 1,139.77/x
  3. Step 3: Cross multiply
    3,220.20x = 4,830.68 × 1,139.77
  4. Step 4: Simplify right side
    3,220.20x = 5,505,864.14
  5. Step 5: Solve for x
    x = 5,505,864.14/3,220.20
  6. Step 6: Final answer
    x = 1,709.79

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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.