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Finding the Fourth Proportional to 1,481.82, 2,221.97 and 788.87

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Solution

The fourth proportional to 1,481.82, 2,221.97 and 788.87 is: 1,182.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,481.82 : 2,221.97 = 788.87 : x
  2. Step 2: Convert to fraction form
    1,481.82/2,221.97 = 788.87/x
  3. Step 3: Cross multiply
    1,481.82x = 2,221.97 × 788.87
  4. Step 4: Simplify right side
    1,481.82x = 1,752,830.42
  5. Step 5: Solve for x
    x = 1,752,830.42/1,481.82
  6. Step 6: Final answer
    x = 1,182.89

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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.