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Finding the Fourth Proportional to 331.79, 499.77 and 271.67

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Solution

The fourth proportional to 331.79, 499.77 and 271.67 is: 409.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.79 : 499.77 = 271.67 : x
  2. Step 2: Convert to fraction form
    331.79/499.77 = 271.67/x
  3. Step 3: Cross multiply
    331.79x = 499.77 × 271.67
  4. Step 4: Simplify right side
    331.79x = 135,770.02
  5. Step 5: Solve for x
    x = 135,770.02/331.79
  6. Step 6: Final answer
    x = 409.21

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.