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Finding the Fourth Proportional to 538.30, 742.37 and 351.73

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Solution

The fourth proportional to 538.30, 742.37 and 351.73 is: 485.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.30 : 742.37 = 351.73 : x
  2. Step 2: Convert to fraction form
    538.30/742.37 = 351.73/x
  3. Step 3: Cross multiply
    538.30x = 742.37 × 351.73
  4. Step 4: Simplify right side
    538.30x = 261,112.04
  5. Step 5: Solve for x
    x = 261,112.04/538.30
  6. Step 6: Final answer
    x = 485.07

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.