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Finding the Fourth Proportional to 4,861.72, 7,286.91 and 1,940.86

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Solution

The fourth proportional to 4,861.72, 7,286.91 and 1,940.86 is: 2,909.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,861.72 : 7,286.91 = 1,940.86 : x
  2. Step 2: Convert to fraction form
    4,861.72/7,286.91 = 1,940.86/x
  3. Step 3: Cross multiply
    4,861.72x = 7,286.91 × 1,940.86
  4. Step 4: Simplify right side
    4,861.72x = 14,142,872.14
  5. Step 5: Solve for x
    x = 14,142,872.14/4,861.72
  6. Step 6: Final answer
    x = 2,909.03

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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.