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Finding the Fourth Proportional to 1,235.26, 1,853.76 and 911.44

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Solution

The fourth proportional to 1,235.26, 1,853.76 and 911.44 is: 1,367.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.26 : 1,853.76 = 911.44 : x
  2. Step 2: Convert to fraction form
    1,235.26/1,853.76 = 911.44/x
  3. Step 3: Cross multiply
    1,235.26x = 1,853.76 × 911.44
  4. Step 4: Simplify right side
    1,235.26x = 1,689,591.01
  5. Step 5: Solve for x
    x = 1,689,591.01/1,235.26
  6. Step 6: Final answer
    x = 1,367.80

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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.