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Finding the Fourth Proportional to 382.60, 573.30 and 321.40

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Solution

The fourth proportional to 382.60, 573.30 and 321.40 is: 481.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.60 : 573.30 = 321.40 : x
  2. Step 2: Convert to fraction form
    382.60/573.30 = 321.40/x
  3. Step 3: Cross multiply
    382.60x = 573.30 × 321.40
  4. Step 4: Simplify right side
    382.60x = 184,258.62
  5. Step 5: Solve for x
    x = 184,258.62/382.60
  6. Step 6: Final answer
    x = 481.60

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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.