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Finding the Fourth Proportional to 685.97, 1,028.27 and 377.97

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Solution

The fourth proportional to 685.97, 1,028.27 and 377.97 is: 566.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.97 : 1,028.27 = 377.97 : x
  2. Step 2: Convert to fraction form
    685.97/1,028.27 = 377.97/x
  3. Step 3: Cross multiply
    685.97x = 1,028.27 × 377.97
  4. Step 4: Simplify right side
    685.97x = 388,651.24
  5. Step 5: Solve for x
    x = 388,651.24/685.97
  6. Step 6: Final answer
    x = 566.57

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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.