Home / 3,891.20-5,370-2,319.44

Finding the Fourth Proportional to 3,891.20, 5,370 and 2,319.44

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Solution

The fourth proportional to 3,891.20, 5,370 and 2,319.44 is: 3,200.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.20 : 5,370 = 2,319.44 : x
  2. Step 2: Convert to fraction form
    3,891.20/5,370 = 2,319.44/x
  3. Step 3: Cross multiply
    3,891.20x = 5,370 × 2,319.44
  4. Step 4: Simplify right side
    3,891.20x = 12,455,392.80
  5. Step 5: Solve for x
    x = 12,455,392.80/3,891.20
  6. Step 6: Final answer
    x = 3,200.91

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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.