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Finding the Fourth Proportional to 912.36, 1,367.39 and 495.88

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Solution

The fourth proportional to 912.36, 1,367.39 and 495.88 is: 743.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.36 : 1,367.39 = 495.88 : x
  2. Step 2: Convert to fraction form
    912.36/1,367.39 = 495.88/x
  3. Step 3: Cross multiply
    912.36x = 1,367.39 × 495.88
  4. Step 4: Simplify right side
    912.36x = 678,052.04
  5. Step 5: Solve for x
    x = 678,052.04/912.36
  6. Step 6: Final answer
    x = 743.18

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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.