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Finding the Fourth Proportional to 251.68, 376.96 and 191.20

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Solution

The fourth proportional to 251.68, 376.96 and 191.20 is: 286.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.68 : 376.96 = 191.20 : x
  2. Step 2: Convert to fraction form
    251.68/376.96 = 191.20/x
  3. Step 3: Cross multiply
    251.68x = 376.96 × 191.20
  4. Step 4: Simplify right side
    251.68x = 72,074.75
  5. Step 5: Solve for x
    x = 72,074.75/251.68
  6. Step 6: Final answer
    x = 286.37

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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.