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Finding the Fourth Proportional to 281.14, 388.16 and 188.00

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Solution

The fourth proportional to 281.14, 388.16 and 188.00 is: 259.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.14 : 388.16 = 188.00 : x
  2. Step 2: Convert to fraction form
    281.14/388.16 = 188.00/x
  3. Step 3: Cross multiply
    281.14x = 388.16 × 188.00
  4. Step 4: Simplify right side
    281.14x = 72,975.54
  5. Step 5: Solve for x
    x = 72,975.54/281.14
  6. Step 6: Final answer
    x = 259.57

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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.