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Finding the Fourth Proportional to 328.86, 493.14 and 191.95

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Solution

The fourth proportional to 328.86, 493.14 and 191.95 is: 287.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.86 : 493.14 = 191.95 : x
  2. Step 2: Convert to fraction form
    328.86/493.14 = 191.95/x
  3. Step 3: Cross multiply
    328.86x = 493.14 × 191.95
  4. Step 4: Simplify right side
    328.86x = 94,654.80
  5. Step 5: Solve for x
    x = 94,654.80/328.86
  6. Step 6: Final answer
    x = 287.83

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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.