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Finding the Fourth Proportional to 383.21, 574.42 and 151.78

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Solution

The fourth proportional to 383.21, 574.42 and 151.78 is: 227.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.21 : 574.42 = 151.78 : x
  2. Step 2: Convert to fraction form
    383.21/574.42 = 151.78/x
  3. Step 3: Cross multiply
    383.21x = 574.42 × 151.78
  4. Step 4: Simplify right side
    383.21x = 87,181.84
  5. Step 5: Solve for x
    x = 87,181.84/383.21
  6. Step 6: Final answer
    x = 227.51

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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.