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Finding the Fourth Proportional to 329.51, 454.67 and 189.61

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Solution

The fourth proportional to 329.51, 454.67 and 189.61 is: 261.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.51 : 454.67 = 189.61 : x
  2. Step 2: Convert to fraction form
    329.51/454.67 = 189.61/x
  3. Step 3: Cross multiply
    329.51x = 454.67 × 189.61
  4. Step 4: Simplify right side
    329.51x = 86,208.61
  5. Step 5: Solve for x
    x = 86,208.61/329.51
  6. Step 6: Final answer
    x = 261.62

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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.