Home / 2,879.69-4,318.62-931.45

Finding the Fourth Proportional to 2,879.69, 4,318.62 and 931.45

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Solution

The fourth proportional to 2,879.69, 4,318.62 and 931.45 is: 1,396.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.69 : 4,318.62 = 931.45 : x
  2. Step 2: Convert to fraction form
    2,879.69/4,318.62 = 931.45/x
  3. Step 3: Cross multiply
    2,879.69x = 4,318.62 × 931.45
  4. Step 4: Simplify right side
    2,879.69x = 4,022,578.60
  5. Step 5: Solve for x
    x = 4,022,578.60/2,879.69
  6. Step 6: Final answer
    x = 1,396.88

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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.