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Finding the Fourth Proportional to 1,453.54, 2,181.39 and 684.58

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Solution

The fourth proportional to 1,453.54, 2,181.39 and 684.58 is: 1,027.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,453.54 : 2,181.39 = 684.58 : x
  2. Step 2: Convert to fraction form
    1,453.54/2,181.39 = 684.58/x
  3. Step 3: Cross multiply
    1,453.54x = 2,181.39 × 684.58
  4. Step 4: Simplify right side
    1,453.54x = 1,493,335.97
  5. Step 5: Solve for x
    x = 1,493,335.97/1,453.54
  6. Step 6: Final answer
    x = 1,027.38

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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.