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Finding the Fourth Proportional to 376.23, 518.97 and 313.05

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Solution

The fourth proportional to 376.23, 518.97 and 313.05 is: 431.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.23 : 518.97 = 313.05 : x
  2. Step 2: Convert to fraction form
    376.23/518.97 = 313.05/x
  3. Step 3: Cross multiply
    376.23x = 518.97 × 313.05
  4. Step 4: Simplify right side
    376.23x = 162,463.56
  5. Step 5: Solve for x
    x = 162,463.56/376.23
  6. Step 6: Final answer
    x = 431.82

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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.