Home / 3,187.40-4,400.78-1,992.85

Finding the Fourth Proportional to 3,187.40, 4,400.78 and 1,992.85

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Solution

The fourth proportional to 3,187.40, 4,400.78 and 1,992.85 is: 2,751.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.40 : 4,400.78 = 1,992.85 : x
  2. Step 2: Convert to fraction form
    3,187.40/4,400.78 = 1,992.85/x
  3. Step 3: Cross multiply
    3,187.40x = 4,400.78 × 1,992.85
  4. Step 4: Simplify right side
    3,187.40x = 8,770,094.42
  5. Step 5: Solve for x
    x = 8,770,094.42/3,187.40
  6. Step 6: Final answer
    x = 2,751.49

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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.