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Finding the Fourth Proportional to 902.16, 1,243.62 and 791.46

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Solution

The fourth proportional to 902.16, 1,243.62 and 791.46 is: 1,091.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.16 : 1,243.62 = 791.46 : x
  2. Step 2: Convert to fraction form
    902.16/1,243.62 = 791.46/x
  3. Step 3: Cross multiply
    902.16x = 1,243.62 × 791.46
  4. Step 4: Simplify right side
    902.16x = 984,275.49
  5. Step 5: Solve for x
    x = 984,275.49/902.16
  6. Step 6: Final answer
    x = 1,091.02

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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.