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Finding the Fourth Proportional to 251.78, 377.79 and 149.25

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Solution

The fourth proportional to 251.78, 377.79 and 149.25 is: 223.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.78 : 377.79 = 149.25 : x
  2. Step 2: Convert to fraction form
    251.78/377.79 = 149.25/x
  3. Step 3: Cross multiply
    251.78x = 377.79 × 149.25
  4. Step 4: Simplify right side
    251.78x = 56,385.16
  5. Step 5: Solve for x
    x = 56,385.16/251.78
  6. Step 6: Final answer
    x = 223.95

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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.