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Finding the Fourth Proportional to 3,505.25, 5,257.92 and 872.75

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Solution

The fourth proportional to 3,505.25, 5,257.92 and 872.75 is: 1,309.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,505.25 : 5,257.92 = 872.75 : x
  2. Step 2: Convert to fraction form
    3,505.25/5,257.92 = 872.75/x
  3. Step 3: Cross multiply
    3,505.25x = 5,257.92 × 872.75
  4. Step 4: Simplify right side
    3,505.25x = 4,588,849.68
  5. Step 5: Solve for x
    x = 4,588,849.68/3,505.25
  6. Step 6: Final answer
    x = 1,309.14

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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.