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Finding the Fourth Proportional to 552.38, 828.52 and 321.12

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Solution

The fourth proportional to 552.38, 828.52 and 321.12 is: 481.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.38 : 828.52 = 321.12 : x
  2. Step 2: Convert to fraction form
    552.38/828.52 = 321.12/x
  3. Step 3: Cross multiply
    552.38x = 828.52 × 321.12
  4. Step 4: Simplify right side
    552.38x = 266,051.03
  5. Step 5: Solve for x
    x = 266,051.03/552.38
  6. Step 6: Final answer
    x = 481.65

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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.