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Finding the Fourth Proportional to 188.14, 281.40 and 153.64

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Solution

The fourth proportional to 188.14, 281.40 and 153.64 is: 229.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.14 : 281.40 = 153.64 : x
  2. Step 2: Convert to fraction form
    188.14/281.40 = 153.64/x
  3. Step 3: Cross multiply
    188.14x = 281.40 × 153.64
  4. Step 4: Simplify right side
    188.14x = 43,234.30
  5. Step 5: Solve for x
    x = 43,234.30/188.14
  6. Step 6: Final answer
    x = 229.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.