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Finding the Fourth Proportional to 1,274.69, 1,912.14 and 495.34

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Solution

The fourth proportional to 1,274.69, 1,912.14 and 495.34 is: 743.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.69 : 1,912.14 = 495.34 : x
  2. Step 2: Convert to fraction form
    1,274.69/1,912.14 = 495.34/x
  3. Step 3: Cross multiply
    1,274.69x = 1,912.14 × 495.34
  4. Step 4: Simplify right side
    1,274.69x = 947,147.39
  5. Step 5: Solve for x
    x = 947,147.39/1,274.69
  6. Step 6: Final answer
    x = 743.04

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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.