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Finding the Fourth Proportional to 2,879.45, 3,973.51 and 1,620.56

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Solution

The fourth proportional to 2,879.45, 3,973.51 and 1,620.56 is: 2,236.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.45 : 3,973.51 = 1,620.56 : x
  2. Step 2: Convert to fraction form
    2,879.45/3,973.51 = 1,620.56/x
  3. Step 3: Cross multiply
    2,879.45x = 3,973.51 × 1,620.56
  4. Step 4: Simplify right side
    2,879.45x = 6,439,291.86
  5. Step 5: Solve for x
    x = 6,439,291.86/2,879.45
  6. Step 6: Final answer
    x = 2,236.29

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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.