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Finding the Fourth Proportional to 1,221.44, 1,832.34 and 605.48

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Solution

The fourth proportional to 1,221.44, 1,832.34 and 605.48 is: 908.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.44 : 1,832.34 = 605.48 : x
  2. Step 2: Convert to fraction form
    1,221.44/1,832.34 = 605.48/x
  3. Step 3: Cross multiply
    1,221.44x = 1,832.34 × 605.48
  4. Step 4: Simplify right side
    1,221.44x = 1,109,445.22
  5. Step 5: Solve for x
    x = 1,109,445.22/1,221.44
  6. Step 6: Final answer
    x = 908.31

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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.