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Finding the Fourth Proportional to 591.77, 816.66 and 329.78

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Solution

The fourth proportional to 591.77, 816.66 and 329.78 is: 455.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.77 : 816.66 = 329.78 : x
  2. Step 2: Convert to fraction form
    591.77/816.66 = 329.78/x
  3. Step 3: Cross multiply
    591.77x = 816.66 × 329.78
  4. Step 4: Simplify right side
    591.77x = 269,314.05
  5. Step 5: Solve for x
    x = 269,314.05/591.77
  6. Step 6: Final answer
    x = 455.10

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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.