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Finding the Fourth Proportional to 1,074.49, 1,481.96 and 720.30

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Solution

The fourth proportional to 1,074.49, 1,481.96 and 720.30 is: 993.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,074.49 : 1,481.96 = 720.30 : x
  2. Step 2: Convert to fraction form
    1,074.49/1,481.96 = 720.30/x
  3. Step 3: Cross multiply
    1,074.49x = 1,481.96 × 720.30
  4. Step 4: Simplify right side
    1,074.49x = 1,067,446.58
  5. Step 5: Solve for x
    x = 1,067,446.58/1,074.49
  6. Step 6: Final answer
    x = 993.44

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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.