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Finding the Fourth Proportional to 328.67, 493.25 and 123.38

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Solution

The fourth proportional to 328.67, 493.25 and 123.38 is: 185.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.67 : 493.25 = 123.38 : x
  2. Step 2: Convert to fraction form
    328.67/493.25 = 123.38/x
  3. Step 3: Cross multiply
    328.67x = 493.25 × 123.38
  4. Step 4: Simplify right side
    328.67x = 60,857.19
  5. Step 5: Solve for x
    x = 60,857.19/328.67
  6. Step 6: Final answer
    x = 185.16

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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.