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Finding the Fourth Proportional to 1,481.52, 2,221.52 and 865.36

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Solution

The fourth proportional to 1,481.52, 2,221.52 and 865.36 is: 1,297.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,481.52 : 2,221.52 = 865.36 : x
  2. Step 2: Convert to fraction form
    1,481.52/2,221.52 = 865.36/x
  3. Step 3: Cross multiply
    1,481.52x = 2,221.52 × 865.36
  4. Step 4: Simplify right side
    1,481.52x = 1,922,414.55
  5. Step 5: Solve for x
    x = 1,922,414.55/1,481.52
  6. Step 6: Final answer
    x = 1,297.60

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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.