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Finding the Fourth Proportional to 843.62, 1,155.47 and 793.80

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Solution

The fourth proportional to 843.62, 1,155.47 and 793.80 is: 1,087.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.62 : 1,155.47 = 793.80 : x
  2. Step 2: Convert to fraction form
    843.62/1,155.47 = 793.80/x
  3. Step 3: Cross multiply
    843.62x = 1,155.47 × 793.80
  4. Step 4: Simplify right side
    843.62x = 917,208.12
  5. Step 5: Solve for x
    x = 917,208.12/843.62
  6. Step 6: Final answer
    x = 1,087.24

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.