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Finding the Fourth Proportional to 383.85, 574.83 and 239.40

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Solution

The fourth proportional to 383.85, 574.83 and 239.40 is: 358.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.85 : 574.83 = 239.40 : x
  2. Step 2: Convert to fraction form
    383.85/574.83 = 239.40/x
  3. Step 3: Cross multiply
    383.85x = 574.83 × 239.40
  4. Step 4: Simplify right side
    383.85x = 137,614.30
  5. Step 5: Solve for x
    x = 137,614.30/383.85
  6. Step 6: Final answer
    x = 358.51

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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.