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Finding the Fourth Proportional to 2,340.42, 3,511.32 and 879.69

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Solution

The fourth proportional to 2,340.42, 3,511.32 and 879.69 is: 1,319.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,340.42 : 3,511.32 = 879.69 : x
  2. Step 2: Convert to fraction form
    2,340.42/3,511.32 = 879.69/x
  3. Step 3: Cross multiply
    2,340.42x = 3,511.32 × 879.69
  4. Step 4: Simplify right side
    2,340.42x = 3,088,873.09
  5. Step 5: Solve for x
    x = 3,088,873.09/2,340.42
  6. Step 6: Final answer
    x = 1,319.79

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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.