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Finding the Fourth Proportional to 281.67, 388.44 and 208.16

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Solution

The fourth proportional to 281.67, 388.44 and 208.16 is: 287.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.67 : 388.44 = 208.16 : x
  2. Step 2: Convert to fraction form
    281.67/388.44 = 208.16/x
  3. Step 3: Cross multiply
    281.67x = 388.44 × 208.16
  4. Step 4: Simplify right side
    281.67x = 80,855.73
  5. Step 5: Solve for x
    x = 80,855.73/281.67
  6. Step 6: Final answer
    x = 287.06

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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.