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Finding the Fourth Proportional to 187.77, 281.11 and 149.30

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Solution

The fourth proportional to 187.77, 281.11 and 149.30 is: 223.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.77 : 281.11 = 149.30 : x
  2. Step 2: Convert to fraction form
    187.77/281.11 = 149.30/x
  3. Step 3: Cross multiply
    187.77x = 281.11 × 149.30
  4. Step 4: Simplify right side
    187.77x = 41,968.98
  5. Step 5: Solve for x
    x = 41,968.98/187.77
  6. Step 6: Final answer
    x = 223.52

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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.