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Finding the Fourth Proportional to 2,879, 4,318.30 and 931.16

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Solution

The fourth proportional to 2,879, 4,318.30 and 931.16 is: 1,396.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879 : 4,318.30 = 931.16 : x
  2. Step 2: Convert to fraction form
    2,879/4,318.30 = 931.16/x
  3. Step 3: Cross multiply
    2,879x = 4,318.30 × 931.16
  4. Step 4: Simplify right side
    2,879x = 4,021,028.23
  5. Step 5: Solve for x
    x = 4,021,028.23/2,879
  6. Step 6: Final answer
    x = 1,396.68

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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.