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Finding the Fourth Proportional to 1,274.53, 1,912.34 and 696.73

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Solution

The fourth proportional to 1,274.53, 1,912.34 and 696.73 is: 1,045.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.53 : 1,912.34 = 696.73 : x
  2. Step 2: Convert to fraction form
    1,274.53/1,912.34 = 696.73/x
  3. Step 3: Cross multiply
    1,274.53x = 1,912.34 × 696.73
  4. Step 4: Simplify right side
    1,274.53x = 1,332,384.65
  5. Step 5: Solve for x
    x = 1,332,384.65/1,274.53
  6. Step 6: Final answer
    x = 1,045.39

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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.