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Finding the Fourth Proportional to 1,136.26, 1,702.26 and 905.41

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Solution

The fourth proportional to 1,136.26, 1,702.26 and 905.41 is: 1,356.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,136.26 : 1,702.26 = 905.41 : x
  2. Step 2: Convert to fraction form
    1,136.26/1,702.26 = 905.41/x
  3. Step 3: Cross multiply
    1,136.26x = 1,702.26 × 905.41
  4. Step 4: Simplify right side
    1,136.26x = 1,541,243.23
  5. Step 5: Solve for x
    x = 1,541,243.23/1,136.26
  6. Step 6: Final answer
    x = 1,356.42

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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.