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Finding the Fourth Proportional to 383.96, 575.46 and 191.64

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Solution

The fourth proportional to 383.96, 575.46 and 191.64 is: 287.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.96 : 575.46 = 191.64 : x
  2. Step 2: Convert to fraction form
    383.96/575.46 = 191.64/x
  3. Step 3: Cross multiply
    383.96x = 575.46 × 191.64
  4. Step 4: Simplify right side
    383.96x = 110,281.15
  5. Step 5: Solve for x
    x = 110,281.15/383.96
  6. Step 6: Final answer
    x = 287.22

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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.