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Finding the Fourth Proportional to 481.92, 722.76 and 238.40

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Solution

The fourth proportional to 481.92, 722.76 and 238.40 is: 357.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.92 : 722.76 = 238.40 : x
  2. Step 2: Convert to fraction form
    481.92/722.76 = 238.40/x
  3. Step 3: Cross multiply
    481.92x = 722.76 × 238.40
  4. Step 4: Simplify right side
    481.92x = 172,305.98
  5. Step 5: Solve for x
    x = 172,305.98/481.92
  6. Step 6: Final answer
    x = 357.54

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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.