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Finding the Fourth Proportional to 3,188.70, 4,786.09 and 1,958.51

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Solution

The fourth proportional to 3,188.70, 4,786.09 and 1,958.51 is: 2,939.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,188.70 : 4,786.09 = 1,958.51 : x
  2. Step 2: Convert to fraction form
    3,188.70/4,786.09 = 1,958.51/x
  3. Step 3: Cross multiply
    3,188.70x = 4,786.09 × 1,958.51
  4. Step 4: Simplify right side
    3,188.70x = 9,373,605.13
  5. Step 5: Solve for x
    x = 9,373,605.13/3,188.70
  6. Step 6: Final answer
    x = 2,939.63

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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.