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Finding the Fourth Proportional to 328.41, 492.61 and 111.99

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Solution

The fourth proportional to 328.41, 492.61 and 111.99 is: 167.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.41 : 492.61 = 111.99 : x
  2. Step 2: Convert to fraction form
    328.41/492.61 = 111.99/x
  3. Step 3: Cross multiply
    328.41x = 492.61 × 111.99
  4. Step 4: Simplify right side
    328.41x = 55,164.93
  5. Step 5: Solve for x
    x = 55,164.93/328.41
  6. Step 6: Final answer
    x = 167.98

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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.