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Finding the Fourth Proportional to 329.87, 455.26 and 205.65

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Solution

The fourth proportional to 329.87, 455.26 and 205.65 is: 283.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.87 : 455.26 = 205.65 : x
  2. Step 2: Convert to fraction form
    329.87/455.26 = 205.65/x
  3. Step 3: Cross multiply
    329.87x = 455.26 × 205.65
  4. Step 4: Simplify right side
    329.87x = 93,624.22
  5. Step 5: Solve for x
    x = 93,624.22/329.87
  6. Step 6: Final answer
    x = 283.82

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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.