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Finding the Fourth Proportional to 281.36, 388.14 and 188.15

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Solution

The fourth proportional to 281.36, 388.14 and 188.15 is: 259.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.36 : 388.14 = 188.15 : x
  2. Step 2: Convert to fraction form
    281.36/388.14 = 188.15/x
  3. Step 3: Cross multiply
    281.36x = 388.14 × 188.15
  4. Step 4: Simplify right side
    281.36x = 73,028.54
  5. Step 5: Solve for x
    x = 73,028.54/281.36
  6. Step 6: Final answer
    x = 259.56

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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.