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Finding the Fourth Proportional to 321.54, 481.38 and 240.72

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Solution

The fourth proportional to 321.54, 481.38 and 240.72 is: 360.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.54 : 481.38 = 240.72 : x
  2. Step 2: Convert to fraction form
    321.54/481.38 = 240.72/x
  3. Step 3: Cross multiply
    321.54x = 481.38 × 240.72
  4. Step 4: Simplify right side
    321.54x = 115,877.79
  5. Step 5: Solve for x
    x = 115,877.79/321.54
  6. Step 6: Final answer
    x = 360.38

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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.