Home / 2,221.30-3,331.19-760.11

Finding the Fourth Proportional to 2,221.30, 3,331.19 and 760.11

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Solution

The fourth proportional to 2,221.30, 3,331.19 and 760.11 is: 1,139.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.30 : 3,331.19 = 760.11 : x
  2. Step 2: Convert to fraction form
    2,221.30/3,331.19 = 760.11/x
  3. Step 3: Cross multiply
    2,221.30x = 3,331.19 × 760.11
  4. Step 4: Simplify right side
    2,221.30x = 2,532,070.83
  5. Step 5: Solve for x
    x = 2,532,070.83/2,221.30
  6. Step 6: Final answer
    x = 1,139.90

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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.