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Finding the Fourth Proportional to 3,288.30, 4,932.48 and 979.80

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Solution

The fourth proportional to 3,288.30, 4,932.48 and 979.80 is: 1,469.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,288.30 : 4,932.48 = 979.80 : x
  2. Step 2: Convert to fraction form
    3,288.30/4,932.48 = 979.80/x
  3. Step 3: Cross multiply
    3,288.30x = 4,932.48 × 979.80
  4. Step 4: Simplify right side
    3,288.30x = 4,832,843.90
  5. Step 5: Solve for x
    x = 4,832,843.90/3,288.30
  6. Step 6: Final answer
    x = 1,469.71

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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.