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Finding the Fourth Proportional to 355.44, 531.69 and 321.69

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Solution

The fourth proportional to 355.44, 531.69 and 321.69 is: 481.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.44 : 531.69 = 321.69 : x
  2. Step 2: Convert to fraction form
    355.44/531.69 = 321.69/x
  3. Step 3: Cross multiply
    355.44x = 531.69 × 321.69
  4. Step 4: Simplify right side
    355.44x = 171,039.36
  5. Step 5: Solve for x
    x = 171,039.36/355.44
  6. Step 6: Final answer
    x = 481.20

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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.