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Finding the Fourth Proportional to 905.26, 1,357.62 and 328

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Solution

The fourth proportional to 905.26, 1,357.62 and 328 is: 491.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.26 : 1,357.62 = 328 : x
  2. Step 2: Convert to fraction form
    905.26/1,357.62 = 328/x
  3. Step 3: Cross multiply
    905.26x = 1,357.62 × 328
  4. Step 4: Simplify right side
    905.26x = 445,299.36
  5. Step 5: Solve for x
    x = 445,299.36/905.26
  6. Step 6: Final answer
    x = 491.90

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.