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Finding the Fourth Proportional to 375.64, 518.44 and 218.28

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Solution

The fourth proportional to 375.64, 518.44 and 218.28 is: 301.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.64 : 518.44 = 218.28 : x
  2. Step 2: Convert to fraction form
    375.64/518.44 = 218.28/x
  3. Step 3: Cross multiply
    375.64x = 518.44 × 218.28
  4. Step 4: Simplify right side
    375.64x = 113,167.30
  5. Step 5: Solve for x
    x = 113,167.30/375.64
  6. Step 6: Final answer
    x = 301.26

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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.