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Finding the Fourth Proportional to 188.37, 281.99 and 172.43

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Solution

The fourth proportional to 188.37, 281.99 and 172.43 is: 258.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.37 : 281.99 = 172.43 : x
  2. Step 2: Convert to fraction form
    188.37/281.99 = 172.43/x
  3. Step 3: Cross multiply
    188.37x = 281.99 × 172.43
  4. Step 4: Simplify right side
    188.37x = 48,621.26
  5. Step 5: Solve for x
    x = 48,621.26/188.37
  6. Step 6: Final answer
    x = 258.12

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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.