Home / 3,108.94-4,290.75-1,782.39

Finding the Fourth Proportional to 3,108.94, 4,290.75 and 1,782.39

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Solution

The fourth proportional to 3,108.94, 4,290.75 and 1,782.39 is: 2,459.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.94 : 4,290.75 = 1,782.39 : x
  2. Step 2: Convert to fraction form
    3,108.94/4,290.75 = 1,782.39/x
  3. Step 3: Cross multiply
    3,108.94x = 4,290.75 × 1,782.39
  4. Step 4: Simplify right side
    3,108.94x = 7,647,785.44
  5. Step 5: Solve for x
    x = 7,647,785.44/3,108.94
  6. Step 6: Final answer
    x = 2,459.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.