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Finding the Fourth Proportional to 486.18, 727.83 and 321.34

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Solution

The fourth proportional to 486.18, 727.83 and 321.34 is: 481.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.18 : 727.83 = 321.34 : x
  2. Step 2: Convert to fraction form
    486.18/727.83 = 321.34/x
  3. Step 3: Cross multiply
    486.18x = 727.83 × 321.34
  4. Step 4: Simplify right side
    486.18x = 233,880.89
  5. Step 5: Solve for x
    x = 233,880.89/486.18
  6. Step 6: Final answer
    x = 481.06

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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.