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Finding the Fourth Proportional to 383.78, 575.66 and 95.22

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Solution

The fourth proportional to 383.78, 575.66 and 95.22 is: 142.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.78 : 575.66 = 95.22 : x
  2. Step 2: Convert to fraction form
    383.78/575.66 = 95.22/x
  3. Step 3: Cross multiply
    383.78x = 575.66 × 95.22
  4. Step 4: Simplify right side
    383.78x = 54,814.35
  5. Step 5: Solve for x
    x = 54,814.35/383.78
  6. Step 6: Final answer
    x = 142.83

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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.