Home / 2,251.86-3,107.88-1,257.20

Finding the Fourth Proportional to 2,251.86, 3,107.88 and 1,257.20

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Solution

The fourth proportional to 2,251.86, 3,107.88 and 1,257.20 is: 1,735.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,251.86 : 3,107.88 = 1,257.20 : x
  2. Step 2: Convert to fraction form
    2,251.86/3,107.88 = 1,257.20/x
  3. Step 3: Cross multiply
    2,251.86x = 3,107.88 × 1,257.20
  4. Step 4: Simplify right side
    2,251.86x = 3,907,215.88
  5. Step 5: Solve for x
    x = 3,907,215.88/2,251.86
  6. Step 6: Final answer
    x = 1,735.10

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1.5x scale

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.