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Finding the Fourth Proportional to 455.26, 628.56 and 324.04

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Solution

The fourth proportional to 455.26, 628.56 and 324.04 is: 447.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.26 : 628.56 = 324.04 : x
  2. Step 2: Convert to fraction form
    455.26/628.56 = 324.04/x
  3. Step 3: Cross multiply
    455.26x = 628.56 × 324.04
  4. Step 4: Simplify right side
    455.26x = 203,678.58
  5. Step 5: Solve for x
    x = 203,678.58/455.26
  6. Step 6: Final answer
    x = 447.39

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Why These Related Problems?

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