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Finding the Fourth Proportional to 902.28, 1,245.09 and 498.48

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Solution

The fourth proportional to 902.28, 1,245.09 and 498.48 is: 687.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.28 : 1,245.09 = 498.48 : x
  2. Step 2: Convert to fraction form
    902.28/1,245.09 = 498.48/x
  3. Step 3: Cross multiply
    902.28x = 1,245.09 × 498.48
  4. Step 4: Simplify right side
    902.28x = 620,652.46
  5. Step 5: Solve for x
    x = 620,652.46/902.28
  6. Step 6: Final answer
    x = 687.87

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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.