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Finding the Fourth Proportional to 376.48, 518.52 and 310.96

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Solution

The fourth proportional to 376.48, 518.52 and 310.96 is: 428.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.48 : 518.52 = 310.96 : x
  2. Step 2: Convert to fraction form
    376.48/518.52 = 310.96/x
  3. Step 3: Cross multiply
    376.48x = 518.52 × 310.96
  4. Step 4: Simplify right side
    376.48x = 161,238.98
  5. Step 5: Solve for x
    x = 161,238.98/376.48
  6. Step 6: Final answer
    x = 428.28

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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.