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Finding the Fourth Proportional to 902.80, 1,345.22 and 804.54

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Solution

The fourth proportional to 902.80, 1,345.22 and 804.54 is: 1,198.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.80 : 1,345.22 = 804.54 : x
  2. Step 2: Convert to fraction form
    902.80/1,345.22 = 804.54/x
  3. Step 3: Cross multiply
    902.80x = 1,345.22 × 804.54
  4. Step 4: Simplify right side
    902.80x = 1,082,283.30
  5. Step 5: Solve for x
    x = 1,082,283.30/902.80
  6. Step 6: Final answer
    x = 1,198.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.