Home / 3,940.70-5,438.07-2,543.45

Finding the Fourth Proportional to 3,940.70, 5,438.07 and 2,543.45

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Solution

The fourth proportional to 3,940.70, 5,438.07 and 2,543.45 is: 3,509.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.70 : 5,438.07 = 2,543.45 : x
  2. Step 2: Convert to fraction form
    3,940.70/5,438.07 = 2,543.45/x
  3. Step 3: Cross multiply
    3,940.70x = 5,438.07 × 2,543.45
  4. Step 4: Simplify right side
    3,940.70x = 13,831,431.95
  5. Step 5: Solve for x
    x = 13,831,431.95/3,940.70
  6. Step 6: Final answer
    x = 3,509.90

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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.