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Finding the Fourth Proportional to 902.54, 1,245.49 and 488.54

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Solution

The fourth proportional to 902.54, 1,245.49 and 488.54 is: 674.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.54 : 1,245.49 = 488.54 : x
  2. Step 2: Convert to fraction form
    902.54/1,245.49 = 488.54/x
  3. Step 3: Cross multiply
    902.54x = 1,245.49 × 488.54
  4. Step 4: Simplify right side
    902.54x = 608,471.68
  5. Step 5: Solve for x
    x = 608,471.68/902.54
  6. Step 6: Final answer
    x = 674.18

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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.