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Finding the Fourth Proportional to 321.02, 481.63 and 190.99

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Solution

The fourth proportional to 321.02, 481.63 and 190.99 is: 286.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.02 : 481.63 = 190.99 : x
  2. Step 2: Convert to fraction form
    321.02/481.63 = 190.99/x
  3. Step 3: Cross multiply
    321.02x = 481.63 × 190.99
  4. Step 4: Simplify right side
    321.02x = 91,986.51
  5. Step 5: Solve for x
    x = 91,986.51/321.02
  6. Step 6: Final answer
    x = 286.54

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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.