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Finding the Fourth Proportional to 3,609.87, 4,978.17 and 2,193.79

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Solution

The fourth proportional to 3,609.87, 4,978.17 and 2,193.79 is: 3,025.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,609.87 : 4,978.17 = 2,193.79 : x
  2. Step 2: Convert to fraction form
    3,609.87/4,978.17 = 2,193.79/x
  3. Step 3: Cross multiply
    3,609.87x = 4,978.17 × 2,193.79
  4. Step 4: Simplify right side
    3,609.87x = 10,921,059.56
  5. Step 5: Solve for x
    x = 10,921,059.56/3,609.87
  6. Step 6: Final answer
    x = 3,025.33

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1.5x scale

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.