Home / 3,390.88-5,085.78-2,745.40

Finding the Fourth Proportional to 3,390.88, 5,085.78 and 2,745.40

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Solution

The fourth proportional to 3,390.88, 5,085.78 and 2,745.40 is: 4,117.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.88 : 5,085.78 = 2,745.40 : x
  2. Step 2: Convert to fraction form
    3,390.88/5,085.78 = 2,745.40/x
  3. Step 3: Cross multiply
    3,390.88x = 5,085.78 × 2,745.40
  4. Step 4: Simplify right side
    3,390.88x = 13,962,500.41
  5. Step 5: Solve for x
    x = 13,962,500.41/3,390.88
  6. Step 6: Final answer
    x = 4,117.66

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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.