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Finding the Fourth Proportional to 6,119.80, 9,179.70 and 3,520.60

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Solution

The fourth proportional to 6,119.80, 9,179.70 and 3,520.60 is: 5,280.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,119.80 : 9,179.70 = 3,520.60 : x
  2. Step 2: Convert to fraction form
    6,119.80/9,179.70 = 3,520.60/x
  3. Step 3: Cross multiply
    6,119.80x = 9,179.70 × 3,520.60
  4. Step 4: Simplify right side
    6,119.80x = 32,318,051.82
  5. Step 5: Solve for x
    x = 32,318,051.82/6,119.80
  6. Step 6: Final answer
    x = 5,280.90

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Double scale
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Similar ratio
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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.