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Finding the Fourth Proportional to 2,163.55, 3,245.37 and 847.12

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Solution

The fourth proportional to 2,163.55, 3,245.37 and 847.12 is: 1,270.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.55 : 3,245.37 = 847.12 : x
  2. Step 2: Convert to fraction form
    2,163.55/3,245.37 = 847.12/x
  3. Step 3: Cross multiply
    2,163.55x = 3,245.37 × 847.12
  4. Step 4: Simplify right side
    2,163.55x = 2,749,217.83
  5. Step 5: Solve for x
    x = 2,749,217.83/2,163.55
  6. Step 6: Final answer
    x = 1,270.70

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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.