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Finding the Fourth Proportional to 2,879.67, 3,973.83 and 1,620.78

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Solution

The fourth proportional to 2,879.67, 3,973.83 and 1,620.78 is: 2,236.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.67 : 3,973.83 = 1,620.78 : x
  2. Step 2: Convert to fraction form
    2,879.67/3,973.83 = 1,620.78/x
  3. Step 3: Cross multiply
    2,879.67x = 3,973.83 × 1,620.78
  4. Step 4: Simplify right side
    2,879.67x = 6,440,704.19
  5. Step 5: Solve for x
    x = 6,440,704.19/2,879.67
  6. Step 6: Final answer
    x = 2,236.61

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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.