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Finding the Fourth Proportional to 328.89, 493.62 and 191.75

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Solution

The fourth proportional to 328.89, 493.62 and 191.75 is: 287.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.89 : 493.62 = 191.75 : x
  2. Step 2: Convert to fraction form
    328.89/493.62 = 191.75/x
  3. Step 3: Cross multiply
    328.89x = 493.62 × 191.75
  4. Step 4: Simplify right side
    328.89x = 94,649.17
  5. Step 5: Solve for x
    x = 94,649.17/328.89
  6. Step 6: Final answer
    x = 287.78

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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.