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Finding the Fourth Proportional to 328.07, 492.19 and 163.64

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Solution

The fourth proportional to 328.07, 492.19 and 163.64 is: 245.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.07 : 492.19 = 163.64 : x
  2. Step 2: Convert to fraction form
    328.07/492.19 = 163.64/x
  3. Step 3: Cross multiply
    328.07x = 492.19 × 163.64
  4. Step 4: Simplify right side
    328.07x = 80,539.10
  5. Step 5: Solve for x
    x = 80,539.10/328.07
  6. Step 6: Final answer
    x = 245.49

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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.