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Finding the Fourth Proportional to 1,274.82, 1,912.02 and 495.18

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Solution

The fourth proportional to 1,274.82, 1,912.02 and 495.18 is: 742.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.82 : 1,912.02 = 495.18 : x
  2. Step 2: Convert to fraction form
    1,274.82/1,912.02 = 495.18/x
  3. Step 3: Cross multiply
    1,274.82x = 1,912.02 × 495.18
  4. Step 4: Simplify right side
    1,274.82x = 946,794.06
  5. Step 5: Solve for x
    x = 946,794.06/1,274.82
  6. Step 6: Final answer
    x = 742.69

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1.5x scale

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.