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Finding the Fourth Proportional to 329.73, 455.05 and 189.87

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Solution

The fourth proportional to 329.73, 455.05 and 189.87 is: 262.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.73 : 455.05 = 189.87 : x
  2. Step 2: Convert to fraction form
    329.73/455.05 = 189.87/x
  3. Step 3: Cross multiply
    329.73x = 455.05 × 189.87
  4. Step 4: Simplify right side
    329.73x = 86,400.34
  5. Step 5: Solve for x
    x = 86,400.34/329.73
  6. Step 6: Final answer
    x = 262.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.