Home / 3,989.19-5,975.55-2,340.78

Finding the Fourth Proportional to 3,989.19, 5,975.55 and 2,340.78

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Solution

The fourth proportional to 3,989.19, 5,975.55 and 2,340.78 is: 3,506.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.19 : 5,975.55 = 2,340.78 : x
  2. Step 2: Convert to fraction form
    3,989.19/5,975.55 = 2,340.78/x
  3. Step 3: Cross multiply
    3,989.19x = 5,975.55 × 2,340.78
  4. Step 4: Simplify right side
    3,989.19x = 13,987,447.93
  5. Step 5: Solve for x
    x = 13,987,447.93/3,989.19
  6. Step 6: Final answer
    x = 3,506.34

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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.