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Finding the Fourth Proportional to 329.56, 454.75 and 189.65

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Solution

The fourth proportional to 329.56, 454.75 and 189.65 is: 261.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.56 : 454.75 = 189.65 : x
  2. Step 2: Convert to fraction form
    329.56/454.75 = 189.65/x
  3. Step 3: Cross multiply
    329.56x = 454.75 × 189.65
  4. Step 4: Simplify right side
    329.56x = 86,243.34
  5. Step 5: Solve for x
    x = 86,243.34/329.56
  6. Step 6: Final answer
    x = 261.69

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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.