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Finding the Fourth Proportional to 793.40, 1,092.64 and 776.44

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Solution

The fourth proportional to 793.40, 1,092.64 and 776.44 is: 1,069.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.40 : 1,092.64 = 776.44 : x
  2. Step 2: Convert to fraction form
    793.40/1,092.64 = 776.44/x
  3. Step 3: Cross multiply
    793.40x = 1,092.64 × 776.44
  4. Step 4: Simplify right side
    793.40x = 848,369.40
  5. Step 5: Solve for x
    x = 848,369.40/793.40
  6. Step 6: Final answer
    x = 1,069.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.