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Finding the Fourth Proportional to 328.65, 492.81 and 191.97

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Solution

The fourth proportional to 328.65, 492.81 and 191.97 is: 287.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.65 : 492.81 = 191.97 : x
  2. Step 2: Convert to fraction form
    328.65/492.81 = 191.97/x
  3. Step 3: Cross multiply
    328.65x = 492.81 × 191.97
  4. Step 4: Simplify right side
    328.65x = 94,602.27
  5. Step 5: Solve for x
    x = 94,602.27/328.65
  6. Step 6: Final answer
    x = 287.85

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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.