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Finding the Fourth Proportional to 3,940.08, 5,910.24 and 1,343

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Solution

The fourth proportional to 3,940.08, 5,910.24 and 1,343 is: 2,014.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.08 : 5,910.24 = 1,343 : x
  2. Step 2: Convert to fraction form
    3,940.08/5,910.24 = 1,343/x
  3. Step 3: Cross multiply
    3,940.08x = 5,910.24 × 1,343
  4. Step 4: Simplify right side
    3,940.08x = 7,937,452.32
  5. Step 5: Solve for x
    x = 7,937,452.32/3,940.08
  6. Step 6: Final answer
    x = 2,014.54

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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.