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Finding the Fourth Proportional to 591.21, 815.83 and 329.21

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Solution

The fourth proportional to 591.21, 815.83 and 329.21 is: 454.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.21 : 815.83 = 329.21 : x
  2. Step 2: Convert to fraction form
    591.21/815.83 = 329.21/x
  3. Step 3: Cross multiply
    591.21x = 815.83 × 329.21
  4. Step 4: Simplify right side
    591.21x = 268,575.73
  5. Step 5: Solve for x
    x = 268,575.73/591.21
  6. Step 6: Final answer
    x = 454.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.