Home / 3,977.78-5,489.32-2,405.42

Finding the Fourth Proportional to 3,977.78, 5,489.32 and 2,405.42

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Solution

The fourth proportional to 3,977.78, 5,489.32 and 2,405.42 is: 3,319.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,977.78 : 5,489.32 = 2,405.42 : x
  2. Step 2: Convert to fraction form
    3,977.78/5,489.32 = 2,405.42/x
  3. Step 3: Cross multiply
    3,977.78x = 5,489.32 × 2,405.42
  4. Step 4: Simplify right side
    3,977.78x = 13,204,086.65
  5. Step 5: Solve for x
    x = 13,204,086.65/3,977.78
  6. Step 6: Final answer
    x = 3,319.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.