Home / 3,878.71-5,349.31-2,619.43

Finding the Fourth Proportional to 3,878.71, 5,349.31 and 2,619.43

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Solution

The fourth proportional to 3,878.71, 5,349.31 and 2,619.43 is: 3,612.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.71 : 5,349.31 = 2,619.43 : x
  2. Step 2: Convert to fraction form
    3,878.71/5,349.31 = 2,619.43/x
  3. Step 3: Cross multiply
    3,878.71x = 5,349.31 × 2,619.43
  4. Step 4: Simplify right side
    3,878.71x = 14,012,143.09
  5. Step 5: Solve for x
    x = 14,012,143.09/3,878.71
  6. Step 6: Final answer
    x = 3,612.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.