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Finding the Fourth Proportional to 251.36, 376.50 and 121.16

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Solution

The fourth proportional to 251.36, 376.50 and 121.16 is: 181.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.36 : 376.50 = 121.16 : x
  2. Step 2: Convert to fraction form
    251.36/376.50 = 121.16/x
  3. Step 3: Cross multiply
    251.36x = 376.50 × 121.16
  4. Step 4: Simplify right side
    251.36x = 45,616.74
  5. Step 5: Solve for x
    x = 45,616.74/251.36
  6. Step 6: Final answer
    x = 181.48

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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.