Home / 3,977.31-5,489.20-2,405.42

Finding the Fourth Proportional to 3,977.31, 5,489.20 and 2,405.42

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Solution

The fourth proportional to 3,977.31, 5,489.20 and 2,405.42 is: 3,319.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,977.31 : 5,489.20 = 2,405.42 : x
  2. Step 2: Convert to fraction form
    3,977.31/5,489.20 = 2,405.42/x
  3. Step 3: Cross multiply
    3,977.31x = 5,489.20 × 2,405.42
  4. Step 4: Simplify right side
    3,977.31x = 13,203,831.46
  5. Step 5: Solve for x
    x = 13,203,831.46/3,977.31
  6. Step 6: Final answer
    x = 3,319.79

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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.