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Finding the Fourth Proportional to 3,998.65, 5,997.98 and 2,147.22

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Solution

The fourth proportional to 3,998.65, 5,997.98 and 2,147.22 is: 3,220.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,998.65 : 5,997.98 = 2,147.22 : x
  2. Step 2: Convert to fraction form
    3,998.65/5,997.98 = 2,147.22/x
  3. Step 3: Cross multiply
    3,998.65x = 5,997.98 × 2,147.22
  4. Step 4: Simplify right side
    3,998.65x = 12,878,962.72
  5. Step 5: Solve for x
    x = 12,878,962.72/3,998.65
  6. Step 6: Final answer
    x = 3,220.83

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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.