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Finding the Fourth Proportional to 376.08, 518.49 and 305.88

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Solution

The fourth proportional to 376.08, 518.49 and 305.88 is: 421.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.08 : 518.49 = 305.88 : x
  2. Step 2: Convert to fraction form
    376.08/518.49 = 305.88/x
  3. Step 3: Cross multiply
    376.08x = 518.49 × 305.88
  4. Step 4: Simplify right side
    376.08x = 158,595.72
  5. Step 5: Solve for x
    x = 158,595.72/376.08
  6. Step 6: Final answer
    x = 421.71

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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.