Home / 2,107.42-3,161.12-720.77

Finding the Fourth Proportional to 2,107.42, 3,161.12 and 720.77

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Solution

The fourth proportional to 2,107.42, 3,161.12 and 720.77 is: 1,081.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.42 : 3,161.12 = 720.77 : x
  2. Step 2: Convert to fraction form
    2,107.42/3,161.12 = 720.77/x
  3. Step 3: Cross multiply
    2,107.42x = 3,161.12 × 720.77
  4. Step 4: Simplify right side
    2,107.42x = 2,278,424.66
  5. Step 5: Solve for x
    x = 2,278,424.66/2,107.42
  6. Step 6: Final answer
    x = 1,081.15

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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.