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Finding the Fourth Proportional to 328.78, 493.37 and 166.48

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Solution

The fourth proportional to 328.78, 493.37 and 166.48 is: 249.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.78 : 493.37 = 166.48 : x
  2. Step 2: Convert to fraction form
    328.78/493.37 = 166.48/x
  3. Step 3: Cross multiply
    328.78x = 493.37 × 166.48
  4. Step 4: Simplify right side
    328.78x = 82,136.24
  5. Step 5: Solve for x
    x = 82,136.24/328.78
  6. Step 6: Final answer
    x = 249.82

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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.