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Finding the Fourth Proportional to 251.80, 376.86 and 143.56

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Solution

The fourth proportional to 251.80, 376.86 and 143.56 is: 214.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.80 : 376.86 = 143.56 : x
  2. Step 2: Convert to fraction form
    251.80/376.86 = 143.56/x
  3. Step 3: Cross multiply
    251.80x = 376.86 × 143.56
  4. Step 4: Simplify right side
    251.80x = 54,102.02
  5. Step 5: Solve for x
    x = 54,102.02/251.80
  6. Step 6: Final answer
    x = 214.86

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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.