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Finding the Fourth Proportional to 251.74, 377.50 and 114.78

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Solution

The fourth proportional to 251.74, 377.50 and 114.78 is: 172.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.74 : 377.50 = 114.78 : x
  2. Step 2: Convert to fraction form
    251.74/377.50 = 114.78/x
  3. Step 3: Cross multiply
    251.74x = 377.50 × 114.78
  4. Step 4: Simplify right side
    251.74x = 43,329.45
  5. Step 5: Solve for x
    x = 43,329.45/251.74
  6. Step 6: Final answer
    x = 172.12

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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.