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Finding the Fourth Proportional to 1,394.09, 1,923.79 and 834.44

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Solution

The fourth proportional to 1,394.09, 1,923.79 and 834.44 is: 1,151.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.09 : 1,923.79 = 834.44 : x
  2. Step 2: Convert to fraction form
    1,394.09/1,923.79 = 834.44/x
  3. Step 3: Cross multiply
    1,394.09x = 1,923.79 × 834.44
  4. Step 4: Simplify right side
    1,394.09x = 1,605,287.33
  5. Step 5: Solve for x
    x = 1,605,287.33/1,394.09
  6. Step 6: Final answer
    x = 1,151.49

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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.