Home / 2,257.20-3,115.12-1,262.68

Finding the Fourth Proportional to 2,257.20, 3,115.12 and 1,262.68

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Solution

The fourth proportional to 2,257.20, 3,115.12 and 1,262.68 is: 1,742.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,257.20 : 3,115.12 = 1,262.68 : x
  2. Step 2: Convert to fraction form
    2,257.20/3,115.12 = 1,262.68/x
  3. Step 3: Cross multiply
    2,257.20x = 3,115.12 × 1,262.68
  4. Step 4: Simplify right side
    2,257.20x = 3,933,399.72
  5. Step 5: Solve for x
    x = 3,933,399.72/2,257.20
  6. Step 6: Final answer
    x = 1,742.60

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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.