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Finding the Fourth Proportional to 621.48, 857.53 and 359.44

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Solution

The fourth proportional to 621.48, 857.53 and 359.44 is: 495.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.48 : 857.53 = 359.44 : x
  2. Step 2: Convert to fraction form
    621.48/857.53 = 359.44/x
  3. Step 3: Cross multiply
    621.48x = 857.53 × 359.44
  4. Step 4: Simplify right side
    621.48x = 308,230.58
  5. Step 5: Solve for x
    x = 308,230.58/621.48
  6. Step 6: Final answer
    x = 495.97

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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.