Home / 3,620.28-5,430.87-1,279.80

Finding the Fourth Proportional to 3,620.28, 5,430.87 and 1,279.80

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Solution

The fourth proportional to 3,620.28, 5,430.87 and 1,279.80 is: 1,919.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.28 : 5,430.87 = 1,279.80 : x
  2. Step 2: Convert to fraction form
    3,620.28/5,430.87 = 1,279.80/x
  3. Step 3: Cross multiply
    3,620.28x = 5,430.87 × 1,279.80
  4. Step 4: Simplify right side
    3,620.28x = 6,950,447.79
  5. Step 5: Solve for x
    x = 6,950,447.79/3,620.28
  6. Step 6: Final answer
    x = 1,919.86

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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.