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Finding the Fourth Proportional to 2,879.40, 4,318.29 and 798.90

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Solution

The fourth proportional to 2,879.40, 4,318.29 and 798.90 is: 1,198.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.40 : 4,318.29 = 798.90 : x
  2. Step 2: Convert to fraction form
    2,879.40/4,318.29 = 798.90/x
  3. Step 3: Cross multiply
    2,879.40x = 4,318.29 × 798.90
  4. Step 4: Simplify right side
    2,879.40x = 3,449,881.88
  5. Step 5: Solve for x
    x = 3,449,881.88/2,879.40
  6. Step 6: Final answer
    x = 1,198.13

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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.