Home / 3,156.20-4,736.10-1,209.80

Finding the Fourth Proportional to 3,156.20, 4,736.10 and 1,209.80

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Solution

The fourth proportional to 3,156.20, 4,736.10 and 1,209.80 is: 1,815.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,156.20 : 4,736.10 = 1,209.80 : x
  2. Step 2: Convert to fraction form
    3,156.20/4,736.10 = 1,209.80/x
  3. Step 3: Cross multiply
    3,156.20x = 4,736.10 × 1,209.80
  4. Step 4: Simplify right side
    3,156.20x = 5,729,733.78
  5. Step 5: Solve for x
    x = 5,729,733.78/3,156.20
  6. Step 6: Final answer
    x = 1,815.39

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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.