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Finding the Fourth Proportional to 372.72, 557.70 and 321.96

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Solution

The fourth proportional to 372.72, 557.70 and 321.96 is: 481.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.72 : 557.70 = 321.96 : x
  2. Step 2: Convert to fraction form
    372.72/557.70 = 321.96/x
  3. Step 3: Cross multiply
    372.72x = 557.70 × 321.96
  4. Step 4: Simplify right side
    372.72x = 179,557.09
  5. Step 5: Solve for x
    x = 179,557.09/372.72
  6. Step 6: Final answer
    x = 481.75

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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.