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Finding the Fourth Proportional to 3,951.68, 5,453.58 and 2,379.80

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Solution

The fourth proportional to 3,951.68, 5,453.58 and 2,379.80 is: 3,284.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,951.68 : 5,453.58 = 2,379.80 : x
  2. Step 2: Convert to fraction form
    3,951.68/5,453.58 = 2,379.80/x
  3. Step 3: Cross multiply
    3,951.68x = 5,453.58 × 2,379.80
  4. Step 4: Simplify right side
    3,951.68x = 12,978,429.68
  5. Step 5: Solve for x
    x = 12,978,429.68/3,951.68
  6. Step 6: Final answer
    x = 3,284.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.