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Finding the Fourth Proportional to 188.45, 281.96 and 140.57

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Solution

The fourth proportional to 188.45, 281.96 and 140.57 is: 210.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.45 : 281.96 = 140.57 : x
  2. Step 2: Convert to fraction form
    188.45/281.96 = 140.57/x
  3. Step 3: Cross multiply
    188.45x = 281.96 × 140.57
  4. Step 4: Simplify right side
    188.45x = 39,634.41
  5. Step 5: Solve for x
    x = 39,634.41/188.45
  6. Step 6: Final answer
    x = 210.32

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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.