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Finding the Fourth Proportional to 375.41, 518.18 and 305.41

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Solution

The fourth proportional to 375.41, 518.18 and 305.41 is: 421.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.41 : 518.18 = 305.41 : x
  2. Step 2: Convert to fraction form
    375.41/518.18 = 305.41/x
  3. Step 3: Cross multiply
    375.41x = 518.18 × 305.41
  4. Step 4: Simplify right side
    375.41x = 158,257.35
  5. Step 5: Solve for x
    x = 158,257.35/375.41
  6. Step 6: Final answer
    x = 421.56

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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.