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Finding the Fourth Proportional to 328.27, 492.41 and 122.80

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Solution

The fourth proportional to 328.27, 492.41 and 122.80 is: 184.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.27 : 492.41 = 122.80 : x
  2. Step 2: Convert to fraction form
    328.27/492.41 = 122.80/x
  3. Step 3: Cross multiply
    328.27x = 492.41 × 122.80
  4. Step 4: Simplify right side
    328.27x = 60,467.77
  5. Step 5: Solve for x
    x = 60,467.77/328.27
  6. Step 6: Final answer
    x = 184.20

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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.