Home / 2,257.28-3,118.20-2,168.72

Finding the Fourth Proportional to 2,257.28, 3,118.20 and 2,168.72

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Solution

The fourth proportional to 2,257.28, 3,118.20 and 2,168.72 is: 2,995.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,257.28 : 3,118.20 = 2,168.72 : x
  2. Step 2: Convert to fraction form
    2,257.28/3,118.20 = 2,168.72/x
  3. Step 3: Cross multiply
    2,257.28x = 3,118.20 × 2,168.72
  4. Step 4: Simplify right side
    2,257.28x = 6,762,502.70
  5. Step 5: Solve for x
    x = 6,762,502.70/2,257.28
  6. Step 6: Final answer
    x = 2,995.86

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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.