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Finding the Fourth Proportional to 328, 492.06 and 111.56

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Solution

The fourth proportional to 328, 492.06 and 111.56 is: 167.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    328 : 492.06 = 111.56 : x
  2. Step 2: Convert to fraction form
    328/492.06 = 111.56/x
  3. Step 3: Cross multiply
    328x = 492.06 × 111.56
  4. Step 4: Simplify right side
    328x = 54,894.21
  5. Step 5: Solve for x
    x = 54,894.21/328
  6. Step 6: Final answer
    x = 167.36

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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.