Home / 3,425.78-5,138.70-1,085.74

Finding the Fourth Proportional to 3,425.78, 5,138.70 and 1,085.74

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Solution

The fourth proportional to 3,425.78, 5,138.70 and 1,085.74 is: 1,628.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,425.78 : 5,138.70 = 1,085.74 : x
  2. Step 2: Convert to fraction form
    3,425.78/5,138.70 = 1,085.74/x
  3. Step 3: Cross multiply
    3,425.78x = 5,138.70 × 1,085.74
  4. Step 4: Simplify right side
    3,425.78x = 5,579,292.14
  5. Step 5: Solve for x
    x = 5,579,292.14/3,425.78
  6. Step 6: Final answer
    x = 1,628.62

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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.