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Finding the Fourth Proportional to 328.23, 492.38 and 108.89

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Solution

The fourth proportional to 328.23, 492.38 and 108.89 is: 163.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.23 : 492.38 = 108.89 : x
  2. Step 2: Convert to fraction form
    328.23/492.38 = 108.89/x
  3. Step 3: Cross multiply
    328.23x = 492.38 × 108.89
  4. Step 4: Simplify right side
    328.23x = 53,613.07
  5. Step 5: Solve for x
    x = 53,613.07/328.23
  6. Step 6: Final answer
    x = 163.34

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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.