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Finding the Fourth Proportional to 1,085.98, 1,629.09 and 469.52

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Solution

The fourth proportional to 1,085.98, 1,629.09 and 469.52 is: 704.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085.98 : 1,629.09 = 469.52 : x
  2. Step 2: Convert to fraction form
    1,085.98/1,629.09 = 469.52/x
  3. Step 3: Cross multiply
    1,085.98x = 1,629.09 × 469.52
  4. Step 4: Simplify right side
    1,085.98x = 764,891.56
  5. Step 5: Solve for x
    x = 764,891.56/1,085.98
  6. Step 6: Final answer
    x = 704.33

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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.