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Finding the Fourth Proportional to 383.45, 574.85 and 328.38

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Solution

The fourth proportional to 383.45, 574.85 and 328.38 is: 492.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.45 : 574.85 = 328.38 : x
  2. Step 2: Convert to fraction form
    383.45/574.85 = 328.38/x
  3. Step 3: Cross multiply
    383.45x = 574.85 × 328.38
  4. Step 4: Simplify right side
    383.45x = 188,767.60
  5. Step 5: Solve for x
    x = 188,767.60/383.45
  6. Step 6: Final answer
    x = 492.29

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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.