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Finding the Fourth Proportional to 5,078.97, 7,011.90 and 3,311.60

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Solution

The fourth proportional to 5,078.97, 7,011.90 and 3,311.60 is: 4,571.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,078.97 : 7,011.90 = 3,311.60 : x
  2. Step 2: Convert to fraction form
    5,078.97/7,011.90 = 3,311.60/x
  3. Step 3: Cross multiply
    5,078.97x = 7,011.90 × 3,311.60
  4. Step 4: Simplify right side
    5,078.97x = 23,220,572.98
  5. Step 5: Solve for x
    x = 23,220,572.98/5,078.97
  6. Step 6: Final answer
    x = 4,571.91

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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.