Home / 2,221.20-3,331.80-1,443.60

Finding the Fourth Proportional to 2,221.20, 3,331.80 and 1,443.60

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Solution

The fourth proportional to 2,221.20, 3,331.80 and 1,443.60 is: 2,165.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.20 : 3,331.80 = 1,443.60 : x
  2. Step 2: Convert to fraction form
    2,221.20/3,331.80 = 1,443.60/x
  3. Step 3: Cross multiply
    2,221.20x = 3,331.80 × 1,443.60
  4. Step 4: Simplify right side
    2,221.20x = 4,809,786.48
  5. Step 5: Solve for x
    x = 4,809,786.48/2,221.20
  6. Step 6: Final answer
    x = 2,165.40

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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.