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Finding the Fourth Proportional to 321.02, 480.72 and 190.94

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Solution

The fourth proportional to 321.02, 480.72 and 190.94 is: 285.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.02 : 480.72 = 190.94 : x
  2. Step 2: Convert to fraction form
    321.02/480.72 = 190.94/x
  3. Step 3: Cross multiply
    321.02x = 480.72 × 190.94
  4. Step 4: Simplify right side
    321.02x = 91,788.68
  5. Step 5: Solve for x
    x = 91,788.68/321.02
  6. Step 6: Final answer
    x = 285.93

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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.