Home / 2,343.90-3,227.20-1,989.12

Finding the Fourth Proportional to 2,343.90, 3,227.20 and 1,989.12

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Solution

The fourth proportional to 2,343.90, 3,227.20 and 1,989.12 is: 2,738.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,343.90 : 3,227.20 = 1,989.12 : x
  2. Step 2: Convert to fraction form
    2,343.90/3,227.20 = 1,989.12/x
  3. Step 3: Cross multiply
    2,343.90x = 3,227.20 × 1,989.12
  4. Step 4: Simplify right side
    2,343.90x = 6,419,288.06
  5. Step 5: Solve for x
    x = 6,419,288.06/2,343.90
  6. Step 6: Final answer
    x = 2,738.72

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Half scale
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Double scale
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Similar ratio
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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.