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Finding the Fourth Proportional to 1,942.74, 2,912.45 and 954.99

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Solution

The fourth proportional to 1,942.74, 2,912.45 and 954.99 is: 1,431.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,942.74 : 2,912.45 = 954.99 : x
  2. Step 2: Convert to fraction form
    1,942.74/2,912.45 = 954.99/x
  3. Step 3: Cross multiply
    1,942.74x = 2,912.45 × 954.99
  4. Step 4: Simplify right side
    1,942.74x = 2,781,355.85
  5. Step 5: Solve for x
    x = 2,781,355.85/1,942.74
  6. Step 6: Final answer
    x = 1,431.67

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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.