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Finding the Fourth Proportional to 3,975.94, 5,964 and 1,378.90

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Solution

The fourth proportional to 3,975.94, 5,964 and 1,378.90 is: 2,068.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,975.94 : 5,964 = 1,378.90 : x
  2. Step 2: Convert to fraction form
    3,975.94/5,964 = 1,378.90/x
  3. Step 3: Cross multiply
    3,975.94x = 5,964 × 1,378.90
  4. Step 4: Simplify right side
    3,975.94x = 8,223,759.60
  5. Step 5: Solve for x
    x = 8,223,759.60/3,975.94
  6. Step 6: Final answer
    x = 2,068.38

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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.