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Finding the Fourth Proportional to 591.88, 816.78 and 329.90

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Solution

The fourth proportional to 591.88, 816.78 and 329.90 is: 455.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.88 : 816.78 = 329.90 : x
  2. Step 2: Convert to fraction form
    591.88/816.78 = 329.90/x
  3. Step 3: Cross multiply
    591.88x = 816.78 × 329.90
  4. Step 4: Simplify right side
    591.88x = 269,455.72
  5. Step 5: Solve for x
    x = 269,455.72/591.88
  6. Step 6: Final answer
    x = 455.25

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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.