Home / 3,107.87-4,289.04-1,781.72

Finding the Fourth Proportional to 3,107.87, 4,289.04 and 1,781.72

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Solution

The fourth proportional to 3,107.87, 4,289.04 and 1,781.72 is: 2,458.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.87 : 4,289.04 = 1,781.72 : x
  2. Step 2: Convert to fraction form
    3,107.87/4,289.04 = 1,781.72/x
  3. Step 3: Cross multiply
    3,107.87x = 4,289.04 × 1,781.72
  4. Step 4: Simplify right side
    3,107.87x = 7,641,846.90
  5. Step 5: Solve for x
    x = 7,641,846.90/3,107.87
  6. Step 6: Final answer
    x = 2,458.87

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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.