Home / 3,809.76-5,715.60-1,212.72

Finding the Fourth Proportional to 3,809.76, 5,715.60 and 1,212.72

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Solution

The fourth proportional to 3,809.76, 5,715.60 and 1,212.72 is: 1,819.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,809.76 : 5,715.60 = 1,212.72 : x
  2. Step 2: Convert to fraction form
    3,809.76/5,715.60 = 1,212.72/x
  3. Step 3: Cross multiply
    3,809.76x = 5,715.60 × 1,212.72
  4. Step 4: Simplify right side
    3,809.76x = 6,931,422.43
  5. Step 5: Solve for x
    x = 6,931,422.43/3,809.76
  6. Step 6: Final answer
    x = 1,819.39

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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.