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Finding the Fourth Proportional to 218.36, 299.92 and 204.80

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Solution

The fourth proportional to 218.36, 299.92 and 204.80 is: 281.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.36 : 299.92 = 204.80 : x
  2. Step 2: Convert to fraction form
    218.36/299.92 = 204.80/x
  3. Step 3: Cross multiply
    218.36x = 299.92 × 204.80
  4. Step 4: Simplify right side
    218.36x = 61,423.65
  5. Step 5: Solve for x
    x = 61,423.65/218.36
  6. Step 6: Final answer
    x = 281.30

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.