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Finding the Fourth Proportional to 2,879.59, 3,974.21 and 2,135.67

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Solution

The fourth proportional to 2,879.59, 3,974.21 and 2,135.67 is: 2,947.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.59 : 3,974.21 = 2,135.67 : x
  2. Step 2: Convert to fraction form
    2,879.59/3,974.21 = 2,135.67/x
  3. Step 3: Cross multiply
    2,879.59x = 3,974.21 × 2,135.67
  4. Step 4: Simplify right side
    2,879.59x = 8,487,606.41
  5. Step 5: Solve for x
    x = 8,487,606.41/2,879.59
  6. Step 6: Final answer
    x = 2,947.51

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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.