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Finding the Fourth Proportional to 621.26, 857.34 and 359.27

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Solution

The fourth proportional to 621.26, 857.34 and 359.27 is: 495.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.26 : 857.34 = 359.27 : x
  2. Step 2: Convert to fraction form
    621.26/857.34 = 359.27/x
  3. Step 3: Cross multiply
    621.26x = 857.34 × 359.27
  4. Step 4: Simplify right side
    621.26x = 308,016.54
  5. Step 5: Solve for x
    x = 308,016.54/621.26
  6. Step 6: Final answer
    x = 495.79

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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.