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Finding the Fourth Proportional to 1,445.44, 1,994 and 885.73

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Solution

The fourth proportional to 1,445.44, 1,994 and 885.73 is: 1,221.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,445.44 : 1,994 = 885.73 : x
  2. Step 2: Convert to fraction form
    1,445.44/1,994 = 885.73/x
  3. Step 3: Cross multiply
    1,445.44x = 1,994 × 885.73
  4. Step 4: Simplify right side
    1,445.44x = 1,766,145.62
  5. Step 5: Solve for x
    x = 1,766,145.62/1,445.44
  6. Step 6: Final answer
    x = 1,221.87

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.