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Finding the Fourth Proportional to 351, 486.62 and 331.56

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Solution

The fourth proportional to 351, 486.62 and 331.56 is: 459.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    351 : 486.62 = 331.56 : x
  2. Step 2: Convert to fraction form
    351/486.62 = 331.56/x
  3. Step 3: Cross multiply
    351x = 486.62 × 331.56
  4. Step 4: Simplify right side
    351x = 161,343.73
  5. Step 5: Solve for x
    x = 161,343.73/351
  6. Step 6: Final answer
    x = 459.67

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.