Home / 2,205.40-3,309.68-1,777.72

Finding the Fourth Proportional to 2,205.40, 3,309.68 and 1,777.72

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Solution

The fourth proportional to 2,205.40, 3,309.68 and 1,777.72 is: 2,667.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,205.40 : 3,309.68 = 1,777.72 : x
  2. Step 2: Convert to fraction form
    2,205.40/3,309.68 = 1,777.72/x
  3. Step 3: Cross multiply
    2,205.40x = 3,309.68 × 1,777.72
  4. Step 4: Simplify right side
    2,205.40x = 5,883,684.33
  5. Step 5: Solve for x
    x = 5,883,684.33/2,205.40
  6. Step 6: Final answer
    x = 2,667.85

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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.