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Finding the Fourth Proportional to 328.74, 492.17 and 191.37

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Solution

The fourth proportional to 328.74, 492.17 and 191.37 is: 286.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.74 : 492.17 = 191.37 : x
  2. Step 2: Convert to fraction form
    328.74/492.17 = 191.37/x
  3. Step 3: Cross multiply
    328.74x = 492.17 × 191.37
  4. Step 4: Simplify right side
    328.74x = 94,185.62
  5. Step 5: Solve for x
    x = 94,185.62/328.74
  6. Step 6: Final answer
    x = 286.50

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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.