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Finding the Fourth Proportional to 3,489.63, 5,235.21 and 1,149.54

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Solution

The fourth proportional to 3,489.63, 5,235.21 and 1,149.54 is: 1,724.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,489.63 : 5,235.21 = 1,149.54 : x
  2. Step 2: Convert to fraction form
    3,489.63/5,235.21 = 1,149.54/x
  3. Step 3: Cross multiply
    3,489.63x = 5,235.21 × 1,149.54
  4. Step 4: Simplify right side
    3,489.63x = 6,018,083.30
  5. Step 5: Solve for x
    x = 6,018,083.30/3,489.63
  6. Step 6: Final answer
    x = 1,724.56

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1.5x scale

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.