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Finding the Fourth Proportional to 3,919.62, 5,880.24 and 1,322.76

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Solution

The fourth proportional to 3,919.62, 5,880.24 and 1,322.76 is: 1,984.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.62 : 5,880.24 = 1,322.76 : x
  2. Step 2: Convert to fraction form
    3,919.62/5,880.24 = 1,322.76/x
  3. Step 3: Cross multiply
    3,919.62x = 5,880.24 × 1,322.76
  4. Step 4: Simplify right side
    3,919.62x = 7,778,146.26
  5. Step 5: Solve for x
    x = 7,778,146.26/3,919.62
  6. Step 6: Final answer
    x = 1,984.41

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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.