Home / 2,105.90-3,155.66-1,180.07

Finding the Fourth Proportional to 2,105.90, 3,155.66 and 1,180.07

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Solution

The fourth proportional to 2,105.90, 3,155.66 and 1,180.07 is: 1,768.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,105.90 : 3,155.66 = 1,180.07 : x
  2. Step 2: Convert to fraction form
    2,105.90/3,155.66 = 1,180.07/x
  3. Step 3: Cross multiply
    2,105.90x = 3,155.66 × 1,180.07
  4. Step 4: Simplify right side
    2,105.90x = 3,723,894.28
  5. Step 5: Solve for x
    x = 3,723,894.28/2,105.90
  6. Step 6: Final answer
    x = 1,768.32

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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.