Home / 3,819.86-5,729.52-1,187.30

Finding the Fourth Proportional to 3,819.86, 5,729.52 and 1,187.30

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Solution

The fourth proportional to 3,819.86, 5,729.52 and 1,187.30 is: 1,780.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,819.86 : 5,729.52 = 1,187.30 : x
  2. Step 2: Convert to fraction form
    3,819.86/5,729.52 = 1,187.30/x
  3. Step 3: Cross multiply
    3,819.86x = 5,729.52 × 1,187.30
  4. Step 4: Simplify right side
    3,819.86x = 6,802,659.10
  5. Step 5: Solve for x
    x = 6,802,659.10/3,819.86
  6. Step 6: Final answer
    x = 1,780.87

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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.