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Finding the Fourth Proportional to 3,906.60, 5,859.99 and 984.95

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Solution

The fourth proportional to 3,906.60, 5,859.99 and 984.95 is: 1,477.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,906.60 : 5,859.99 = 984.95 : x
  2. Step 2: Convert to fraction form
    3,906.60/5,859.99 = 984.95/x
  3. Step 3: Cross multiply
    3,906.60x = 5,859.99 × 984.95
  4. Step 4: Simplify right side
    3,906.60x = 5,771,767.85
  5. Step 5: Solve for x
    x = 5,771,767.85/3,906.60
  6. Step 6: Final answer
    x = 1,477.44

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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.