Home / 3,108.11-4,289.78-1,782.68

Finding the Fourth Proportional to 3,108.11, 4,289.78 and 1,782.68

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Solution

The fourth proportional to 3,108.11, 4,289.78 and 1,782.68 is: 2,460.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.11 : 4,289.78 = 1,782.68 : x
  2. Step 2: Convert to fraction form
    3,108.11/4,289.78 = 1,782.68/x
  3. Step 3: Cross multiply
    3,108.11x = 4,289.78 × 1,782.68
  4. Step 4: Simplify right side
    3,108.11x = 7,647,320.19
  5. Step 5: Solve for x
    x = 7,647,320.19/3,108.11
  6. Step 6: Final answer
    x = 2,460.44

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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.