Home / 2,146.85-3,220.18-1,257.88

Finding the Fourth Proportional to 2,146.85, 3,220.18 and 1,257.88

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Solution

The fourth proportional to 2,146.85, 3,220.18 and 1,257.88 is: 1,886.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,146.85 : 3,220.18 = 1,257.88 : x
  2. Step 2: Convert to fraction form
    2,146.85/3,220.18 = 1,257.88/x
  3. Step 3: Cross multiply
    2,146.85x = 3,220.18 × 1,257.88
  4. Step 4: Simplify right side
    2,146.85x = 4,050,585.68
  5. Step 5: Solve for x
    x = 4,050,585.68/2,146.85
  6. Step 6: Final answer
    x = 1,886.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.