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Finding the Fourth Proportional to 958.98, 1,438.94 and 343.14

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Solution

The fourth proportional to 958.98, 1,438.94 and 343.14 is: 514.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.98 : 1,438.94 = 343.14 : x
  2. Step 2: Convert to fraction form
    958.98/1,438.94 = 343.14/x
  3. Step 3: Cross multiply
    958.98x = 1,438.94 × 343.14
  4. Step 4: Simplify right side
    958.98x = 493,757.87
  5. Step 5: Solve for x
    x = 493,757.87/958.98
  6. Step 6: Final answer
    x = 514.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.