Home / 3,431.20-5,144.36-2,780.50

Finding the Fourth Proportional to 3,431.20, 5,144.36 and 2,780.50

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Solution

The fourth proportional to 3,431.20, 5,144.36 and 2,780.50 is: 4,168.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.20 : 5,144.36 = 2,780.50 : x
  2. Step 2: Convert to fraction form
    3,431.20/5,144.36 = 2,780.50/x
  3. Step 3: Cross multiply
    3,431.20x = 5,144.36 × 2,780.50
  4. Step 4: Simplify right side
    3,431.20x = 14,303,892.98
  5. Step 5: Solve for x
    x = 14,303,892.98/3,431.20
  6. Step 6: Final answer
    x = 4,168.77

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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.