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Finding the Fourth Proportional to 3,392.85, 5,091.27 and 1,639.65

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Solution

The fourth proportional to 3,392.85, 5,091.27 and 1,639.65 is: 2,460.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,392.85 : 5,091.27 = 1,639.65 : x
  2. Step 2: Convert to fraction form
    3,392.85/5,091.27 = 1,639.65/x
  3. Step 3: Cross multiply
    3,392.85x = 5,091.27 × 1,639.65
  4. Step 4: Simplify right side
    3,392.85x = 8,347,900.86
  5. Step 5: Solve for x
    x = 8,347,900.86/3,392.85
  6. Step 6: Final answer
    x = 2,460.44

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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.