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Finding the Fourth Proportional to 187.81, 281.31 and 151.57

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Solution

The fourth proportional to 187.81, 281.31 and 151.57 is: 227.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.81 : 281.31 = 151.57 : x
  2. Step 2: Convert to fraction form
    187.81/281.31 = 151.57/x
  3. Step 3: Cross multiply
    187.81x = 281.31 × 151.57
  4. Step 4: Simplify right side
    187.81x = 42,638.16
  5. Step 5: Solve for x
    x = 42,638.16/187.81
  6. Step 6: Final answer
    x = 227.03

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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.