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Finding the Fourth Proportional to 3,292.80, 4,940.16 and 984.96

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Solution

The fourth proportional to 3,292.80, 4,940.16 and 984.96 is: 1,477.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,292.80 : 4,940.16 = 984.96 : x
  2. Step 2: Convert to fraction form
    3,292.80/4,940.16 = 984.96/x
  3. Step 3: Cross multiply
    3,292.80x = 4,940.16 × 984.96
  4. Step 4: Simplify right side
    3,292.80x = 4,865,859.99
  5. Step 5: Solve for x
    x = 4,865,859.99/3,292.80
  6. Step 6: Final answer
    x = 1,477.73

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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.