Home / 1,230.39-1,845.15-408.44

Finding the Fourth Proportional to 1,230.39, 1,845.15 and 408.44

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Solution

The fourth proportional to 1,230.39, 1,845.15 and 408.44 is: 612.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.39 : 1,845.15 = 408.44 : x
  2. Step 2: Convert to fraction form
    1,230.39/1,845.15 = 408.44/x
  3. Step 3: Cross multiply
    1,230.39x = 1,845.15 × 408.44
  4. Step 4: Simplify right side
    1,230.39x = 753,636.15
  5. Step 5: Solve for x
    x = 753,636.15/1,230.39
  6. Step 6: Final answer
    x = 612.52

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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.