Home / 3,878.64-5,352.78-2,619.90

Finding the Fourth Proportional to 3,878.64, 5,352.78 and 2,619.90

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Solution

The fourth proportional to 3,878.64, 5,352.78 and 2,619.90 is: 3,615.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.64 : 5,352.78 = 2,619.90 : x
  2. Step 2: Convert to fraction form
    3,878.64/5,352.78 = 2,619.90/x
  3. Step 3: Cross multiply
    3,878.64x = 5,352.78 × 2,619.90
  4. Step 4: Simplify right side
    3,878.64x = 14,023,748.32
  5. Step 5: Solve for x
    x = 14,023,748.32/3,878.64
  6. Step 6: Final answer
    x = 3,615.64

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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.