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Finding the Fourth Proportional to 6,190.80, 9,286.20 and 5,557.20

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Solution

The fourth proportional to 6,190.80, 9,286.20 and 5,557.20 is: 8,335.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,190.80 : 9,286.20 = 5,557.20 : x
  2. Step 2: Convert to fraction form
    6,190.80/9,286.20 = 5,557.20/x
  3. Step 3: Cross multiply
    6,190.80x = 9,286.20 × 5,557.20
  4. Step 4: Simplify right side
    6,190.80x = 51,605,270.64
  5. Step 5: Solve for x
    x = 51,605,270.64/6,190.80
  6. Step 6: Final answer
    x = 8,335.80

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Half scale
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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.