Home / 3,451.78-5,178.20-1,260.01

Finding the Fourth Proportional to 3,451.78, 5,178.20 and 1,260.01

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Solution

The fourth proportional to 3,451.78, 5,178.20 and 1,260.01 is: 1,890.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,451.78 : 5,178.20 = 1,260.01 : x
  2. Step 2: Convert to fraction form
    3,451.78/5,178.20 = 1,260.01/x
  3. Step 3: Cross multiply
    3,451.78x = 5,178.20 × 1,260.01
  4. Step 4: Simplify right side
    3,451.78x = 6,524,583.78
  5. Step 5: Solve for x
    x = 6,524,583.78/3,451.78
  6. Step 6: Final answer
    x = 1,890.21

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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.