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Finding the Fourth Proportional to 3,208.56, 4,811.59 and 986.73

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Solution

The fourth proportional to 3,208.56, 4,811.59 and 986.73 is: 1,479.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,208.56 : 4,811.59 = 986.73 : x
  2. Step 2: Convert to fraction form
    3,208.56/4,811.59 = 986.73/x
  3. Step 3: Cross multiply
    3,208.56x = 4,811.59 × 986.73
  4. Step 4: Simplify right side
    3,208.56x = 4,747,711.21
  5. Step 5: Solve for x
    x = 4,747,711.21/3,208.56
  6. Step 6: Final answer
    x = 1,479.70

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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.