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Finding the Fourth Proportional to 950.00, 1,311.39 and 687.96

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Solution

The fourth proportional to 950.00, 1,311.39 and 687.96 is: 949.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.00 : 1,311.39 = 687.96 : x
  2. Step 2: Convert to fraction form
    950.00/1,311.39 = 687.96/x
  3. Step 3: Cross multiply
    950.00x = 1,311.39 × 687.96
  4. Step 4: Simplify right side
    950.00x = 902,183.86
  5. Step 5: Solve for x
    x = 902,183.86/950.00
  6. Step 6: Final answer
    x = 949.67

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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.