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Finding the Fourth Proportional to 815.44, 1,222.06 and 376.44

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Solution

The fourth proportional to 815.44, 1,222.06 and 376.44 is: 564.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.44 : 1,222.06 = 376.44 : x
  2. Step 2: Convert to fraction form
    815.44/1,222.06 = 376.44/x
  3. Step 3: Cross multiply
    815.44x = 1,222.06 × 376.44
  4. Step 4: Simplify right side
    815.44x = 460,032.27
  5. Step 5: Solve for x
    x = 460,032.27/815.44
  6. Step 6: Final answer
    x = 564.15

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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.