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Finding the Fourth Proportional to 548.69, 818.43 and 490.37

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Solution

The fourth proportional to 548.69, 818.43 and 490.37 is: 731.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.69 : 818.43 = 490.37 : x
  2. Step 2: Convert to fraction form
    548.69/818.43 = 490.37/x
  3. Step 3: Cross multiply
    548.69x = 818.43 × 490.37
  4. Step 4: Simplify right side
    548.69x = 401,329.43
  5. Step 5: Solve for x
    x = 401,329.43/548.69
  6. Step 6: Final answer
    x = 731.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.