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Finding the Fourth Proportional to 382.77, 573.03 and 321.21

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Solution

The fourth proportional to 382.77, 573.03 and 321.21 is: 480.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.77 : 573.03 = 321.21 : x
  2. Step 2: Convert to fraction form
    382.77/573.03 = 321.21/x
  3. Step 3: Cross multiply
    382.77x = 573.03 × 321.21
  4. Step 4: Simplify right side
    382.77x = 184,062.97
  5. Step 5: Solve for x
    x = 184,062.97/382.77
  6. Step 6: Final answer
    x = 480.87

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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.