Home / 3,209.50-4,814.70-1,129.78

Finding the Fourth Proportional to 3,209.50, 4,814.70 and 1,129.78

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Solution

The fourth proportional to 3,209.50, 4,814.70 and 1,129.78 is: 1,694.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,209.50 : 4,814.70 = 1,129.78 : x
  2. Step 2: Convert to fraction form
    3,209.50/4,814.70 = 1,129.78/x
  3. Step 3: Cross multiply
    3,209.50x = 4,814.70 × 1,129.78
  4. Step 4: Simplify right side
    3,209.50x = 5,439,551.77
  5. Step 5: Solve for x
    x = 5,439,551.77/3,209.50
  6. Step 6: Final answer
    x = 1,694.83

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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.