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Finding the Fourth Proportional to 383.39, 574.79 and 191.15

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Solution

The fourth proportional to 383.39, 574.79 and 191.15 is: 286.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.39 : 574.79 = 191.15 : x
  2. Step 2: Convert to fraction form
    383.39/574.79 = 191.15/x
  3. Step 3: Cross multiply
    383.39x = 574.79 × 191.15
  4. Step 4: Simplify right side
    383.39x = 109,867.28
  5. Step 5: Solve for x
    x = 109,867.28/383.39
  6. Step 6: Final answer
    x = 286.57

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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.