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Finding the Fourth Proportional to 187.87, 281.80 and 157.09

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Solution

The fourth proportional to 187.87, 281.80 and 157.09 is: 235.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.87 : 281.80 = 157.09 : x
  2. Step 2: Convert to fraction form
    187.87/281.80 = 157.09/x
  3. Step 3: Cross multiply
    187.87x = 281.80 × 157.09
  4. Step 4: Simplify right side
    187.87x = 44,266.55
  5. Step 5: Solve for x
    x = 44,266.55/187.87
  6. Step 6: Final answer
    x = 235.63

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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.