Home / 2,765.20-4,143.60-2,031.28

Finding the Fourth Proportional to 2,765.20, 4,143.60 and 2,031.28

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Solution

The fourth proportional to 2,765.20, 4,143.60 and 2,031.28 is: 3,043.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,765.20 : 4,143.60 = 2,031.28 : x
  2. Step 2: Convert to fraction form
    2,765.20/4,143.60 = 2,031.28/x
  3. Step 3: Cross multiply
    2,765.20x = 4,143.60 × 2,031.28
  4. Step 4: Simplify right side
    2,765.20x = 8,416,811.81
  5. Step 5: Solve for x
    x = 8,416,811.81/2,765.20
  6. Step 6: Final answer
    x = 3,043.83

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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.