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Finding the Fourth Proportional to 1,230.54, 1,845.61 and 408.82

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Solution

The fourth proportional to 1,230.54, 1,845.61 and 408.82 is: 613.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.54 : 1,845.61 = 408.82 : x
  2. Step 2: Convert to fraction form
    1,230.54/1,845.61 = 408.82/x
  3. Step 3: Cross multiply
    1,230.54x = 1,845.61 × 408.82
  4. Step 4: Simplify right side
    1,230.54x = 754,522.28
  5. Step 5: Solve for x
    x = 754,522.28/1,230.54
  6. Step 6: Final answer
    x = 613.16

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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.