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Finding the Fourth Proportional to 552.85, 828.77 and 321.85

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Solution

The fourth proportional to 552.85, 828.77 and 321.85 is: 482.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.85 : 828.77 = 321.85 : x
  2. Step 2: Convert to fraction form
    552.85/828.77 = 321.85/x
  3. Step 3: Cross multiply
    552.85x = 828.77 × 321.85
  4. Step 4: Simplify right side
    552.85x = 266,739.05
  5. Step 5: Solve for x
    x = 266,739.05/552.85
  6. Step 6: Final answer
    x = 482.48

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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.