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Finding the Fourth Proportional to 251.45, 376.50 and 143.09

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Solution

The fourth proportional to 251.45, 376.50 and 143.09 is: 214.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.45 : 376.50 = 143.09 : x
  2. Step 2: Convert to fraction form
    251.45/376.50 = 143.09/x
  3. Step 3: Cross multiply
    251.45x = 376.50 × 143.09
  4. Step 4: Simplify right side
    251.45x = 53,873.39
  5. Step 5: Solve for x
    x = 53,873.39/251.45
  6. Step 6: Final answer
    x = 214.25

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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.