Home / 2,122.56-3,182.88-1,245.48

Finding the Fourth Proportional to 2,122.56, 3,182.88 and 1,245.48

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Solution

The fourth proportional to 2,122.56, 3,182.88 and 1,245.48 is: 1,867.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.56 : 3,182.88 = 1,245.48 : x
  2. Step 2: Convert to fraction form
    2,122.56/3,182.88 = 1,245.48/x
  3. Step 3: Cross multiply
    2,122.56x = 3,182.88 × 1,245.48
  4. Step 4: Simplify right side
    2,122.56x = 3,964,213.38
  5. Step 5: Solve for x
    x = 3,964,213.38/2,122.56
  6. Step 6: Final answer
    x = 1,867.66

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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.