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Finding the Fourth Proportional to 3,920.84, 5,880.80 and 1,455.71

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Solution

The fourth proportional to 3,920.84, 5,880.80 and 1,455.71 is: 2,183.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.84 : 5,880.80 = 1,455.71 : x
  2. Step 2: Convert to fraction form
    3,920.84/5,880.80 = 1,455.71/x
  3. Step 3: Cross multiply
    3,920.84x = 5,880.80 × 1,455.71
  4. Step 4: Simplify right side
    3,920.84x = 8,560,709.96
  5. Step 5: Solve for x
    x = 8,560,709.96/3,920.84
  6. Step 6: Final answer
    x = 2,183.39

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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.