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Finding the Fourth Proportional to 552.16, 828.75 and 321.31

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Solution

The fourth proportional to 552.16, 828.75 and 321.31 is: 482.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.16 : 828.75 = 321.31 : x
  2. Step 2: Convert to fraction form
    552.16/828.75 = 321.31/x
  3. Step 3: Cross multiply
    552.16x = 828.75 × 321.31
  4. Step 4: Simplify right side
    552.16x = 266,285.66
  5. Step 5: Solve for x
    x = 266,285.66/552.16
  6. Step 6: Final answer
    x = 482.26

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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.