Home / 3,108.87-4,290.11-1,782.49

Finding the Fourth Proportional to 3,108.87, 4,290.11 and 1,782.49

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Solution

The fourth proportional to 3,108.87, 4,290.11 and 1,782.49 is: 2,459.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.87 : 4,290.11 = 1,782.49 : x
  2. Step 2: Convert to fraction form
    3,108.87/4,290.11 = 1,782.49/x
  3. Step 3: Cross multiply
    3,108.87x = 4,290.11 × 1,782.49
  4. Step 4: Simplify right side
    3,108.87x = 7,647,069.26
  5. Step 5: Solve for x
    x = 7,647,069.26/3,108.87
  6. Step 6: Final answer
    x = 2,459.76

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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.