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Finding the Fourth Proportional to 4,979.55, 7,469.87 and 1,861.05

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Solution

The fourth proportional to 4,979.55, 7,469.87 and 1,861.05 is: 2,791.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,979.55 : 7,469.87 = 1,861.05 : x
  2. Step 2: Convert to fraction form
    4,979.55/7,469.87 = 1,861.05/x
  3. Step 3: Cross multiply
    4,979.55x = 7,469.87 × 1,861.05
  4. Step 4: Simplify right side
    4,979.55x = 13,901,792.26
  5. Step 5: Solve for x
    x = 13,901,792.26/4,979.55
  6. Step 6: Final answer
    x = 2,791.78

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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.