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Finding the Fourth Proportional to 3,951.79, 5,919.48 and 3,213.68

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Solution

The fourth proportional to 3,951.79, 5,919.48 and 3,213.68 is: 4,813.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,951.79 : 5,919.48 = 3,213.68 : x
  2. Step 2: Convert to fraction form
    3,951.79/5,919.48 = 3,213.68/x
  3. Step 3: Cross multiply
    3,951.79x = 5,919.48 × 3,213.68
  4. Step 4: Simplify right side
    3,951.79x = 19,023,284.89
  5. Step 5: Solve for x
    x = 19,023,284.89/3,951.79
  6. Step 6: Final answer
    x = 4,813.84

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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.