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Finding the Fourth Proportional to 354.12, 528.56 and 338.31

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Solution

The fourth proportional to 354.12, 528.56 and 338.31 is: 504.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.12 : 528.56 = 338.31 : x
  2. Step 2: Convert to fraction form
    354.12/528.56 = 338.31/x
  3. Step 3: Cross multiply
    354.12x = 528.56 × 338.31
  4. Step 4: Simplify right side
    354.12x = 178,815.44
  5. Step 5: Solve for x
    x = 178,815.44/354.12
  6. Step 6: Final answer
    x = 504.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.