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Finding the Fourth Proportional to 789.92, 1,090.09 and 453.73

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Solution

The fourth proportional to 789.92, 1,090.09 and 453.73 is: 626.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.92 : 1,090.09 = 453.73 : x
  2. Step 2: Convert to fraction form
    789.92/1,090.09 = 453.73/x
  3. Step 3: Cross multiply
    789.92x = 1,090.09 × 453.73
  4. Step 4: Simplify right side
    789.92x = 494,606.54
  5. Step 5: Solve for x
    x = 494,606.54/789.92
  6. Step 6: Final answer
    x = 626.15

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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.