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Finding the Fourth Proportional to 789.10, 1,181.49 and 403.54

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Solution

The fourth proportional to 789.10, 1,181.49 and 403.54 is: 604.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.10 : 1,181.49 = 403.54 : x
  2. Step 2: Convert to fraction form
    789.10/1,181.49 = 403.54/x
  3. Step 3: Cross multiply
    789.10x = 1,181.49 × 403.54
  4. Step 4: Simplify right side
    789.10x = 476,778.47
  5. Step 5: Solve for x
    x = 476,778.47/789.10
  6. Step 6: Final answer
    x = 604.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.