Home / 3,431.43-5,143.26-1,578.72

Finding the Fourth Proportional to 3,431.43, 5,143.26 and 1,578.72

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Solution

The fourth proportional to 3,431.43, 5,143.26 and 1,578.72 is: 2,366.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.43 : 5,143.26 = 1,578.72 : x
  2. Step 2: Convert to fraction form
    3,431.43/5,143.26 = 1,578.72/x
  3. Step 3: Cross multiply
    3,431.43x = 5,143.26 × 1,578.72
  4. Step 4: Simplify right side
    3,431.43x = 8,119,767.43
  5. Step 5: Solve for x
    x = 8,119,767.43/3,431.43
  6. Step 6: Final answer
    x = 2,366.29

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1.5x scale

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.