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Finding the Fourth Proportional to 328.80, 493.34 and 263.73

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Solution

The fourth proportional to 328.80, 493.34 and 263.73 is: 395.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.80 : 493.34 = 263.73 : x
  2. Step 2: Convert to fraction form
    328.80/493.34 = 263.73/x
  3. Step 3: Cross multiply
    328.80x = 493.34 × 263.73
  4. Step 4: Simplify right side
    328.80x = 130,107.24
  5. Step 5: Solve for x
    x = 130,107.24/328.80
  6. Step 6: Final answer
    x = 395.70

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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.