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Finding the Fourth Proportional to 3,674.28, 5,512.22 and 1,209

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Solution

The fourth proportional to 3,674.28, 5,512.22 and 1,209 is: 1,813.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,674.28 : 5,512.22 = 1,209 : x
  2. Step 2: Convert to fraction form
    3,674.28/5,512.22 = 1,209/x
  3. Step 3: Cross multiply
    3,674.28x = 5,512.22 × 1,209
  4. Step 4: Simplify right side
    3,674.28x = 6,664,273.98
  5. Step 5: Solve for x
    x = 6,664,273.98/3,674.28
  6. Step 6: Final answer
    x = 1,813.76

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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.