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Finding the Fourth Proportional to 815.25, 1,223.03 and 376.33

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Solution

The fourth proportional to 815.25, 1,223.03 and 376.33 is: 564.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.25 : 1,223.03 = 376.33 : x
  2. Step 2: Convert to fraction form
    815.25/1,223.03 = 376.33/x
  3. Step 3: Cross multiply
    815.25x = 1,223.03 × 376.33
  4. Step 4: Simplify right side
    815.25x = 460,257.94
  5. Step 5: Solve for x
    x = 460,257.94/815.25
  6. Step 6: Final answer
    x = 564.56

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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.