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Finding the Fourth Proportional to 375.98, 518.87 and 218.65

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Solution

The fourth proportional to 375.98, 518.87 and 218.65 is: 301.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.98 : 518.87 = 218.65 : x
  2. Step 2: Convert to fraction form
    375.98/518.87 = 218.65/x
  3. Step 3: Cross multiply
    375.98x = 518.87 × 218.65
  4. Step 4: Simplify right side
    375.98x = 113,450.93
  5. Step 5: Solve for x
    x = 113,450.93/375.98
  6. Step 6: Final answer
    x = 301.75

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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.