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Finding the Fourth Proportional to 3,951.88, 5,928.68 and 1,178.78

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Solution

The fourth proportional to 3,951.88, 5,928.68 and 1,178.78 is: 1,768.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,951.88 : 5,928.68 = 1,178.78 : x
  2. Step 2: Convert to fraction form
    3,951.88/5,928.68 = 1,178.78/x
  3. Step 3: Cross multiply
    3,951.88x = 5,928.68 × 1,178.78
  4. Step 4: Simplify right side
    3,951.88x = 6,988,604.95
  5. Step 5: Solve for x
    x = 6,988,604.95/3,951.88
  6. Step 6: Final answer
    x = 1,768.42

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1.5x scale

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.