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Finding the Fourth Proportional to 328.33, 492.25 and 218.67

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Solution

The fourth proportional to 328.33, 492.25 and 218.67 is: 327.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.33 : 492.25 = 218.67 : x
  2. Step 2: Convert to fraction form
    328.33/492.25 = 218.67/x
  3. Step 3: Cross multiply
    328.33x = 492.25 × 218.67
  4. Step 4: Simplify right side
    328.33x = 107,640.31
  5. Step 5: Solve for x
    x = 107,640.31/328.33
  6. Step 6: Final answer
    x = 327.84

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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.