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Finding the Fourth Proportional to 372.44, 557.34 and 321.72

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Solution

The fourth proportional to 372.44, 557.34 and 321.72 is: 481.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.44 : 557.34 = 321.72 : x
  2. Step 2: Convert to fraction form
    372.44/557.34 = 321.72/x
  3. Step 3: Cross multiply
    372.44x = 557.34 × 321.72
  4. Step 4: Simplify right side
    372.44x = 179,307.42
  5. Step 5: Solve for x
    x = 179,307.42/372.44
  6. Step 6: Final answer
    x = 481.44

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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.