Home / 2,221.20-3,332.34-661.19

Finding the Fourth Proportional to 2,221.20, 3,332.34 and 661.19

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Solution

The fourth proportional to 2,221.20, 3,332.34 and 661.19 is: 991.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.20 : 3,332.34 = 661.19 : x
  2. Step 2: Convert to fraction form
    2,221.20/3,332.34 = 661.19/x
  3. Step 3: Cross multiply
    2,221.20x = 3,332.34 × 661.19
  4. Step 4: Simplify right side
    2,221.20x = 2,203,309.88
  5. Step 5: Solve for x
    x = 2,203,309.88/2,221.20
  6. Step 6: Final answer
    x = 991.95

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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.