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Finding the Fourth Proportional to 383.28, 574.90 and 190.76

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Solution

The fourth proportional to 383.28, 574.90 and 190.76 is: 286.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.28 : 574.90 = 190.76 : x
  2. Step 2: Convert to fraction form
    383.28/574.90 = 190.76/x
  3. Step 3: Cross multiply
    383.28x = 574.90 × 190.76
  4. Step 4: Simplify right side
    383.28x = 109,667.92
  5. Step 5: Solve for x
    x = 109,667.92/383.28
  6. Step 6: Final answer
    x = 286.13

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Double scale
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Similar ratio
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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.