Home / 3,995.28-5,990.76-1,221.12

Finding the Fourth Proportional to 3,995.28, 5,990.76 and 1,221.12

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Solution

The fourth proportional to 3,995.28, 5,990.76 and 1,221.12 is: 1,831.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,995.28 : 5,990.76 = 1,221.12 : x
  2. Step 2: Convert to fraction form
    3,995.28/5,990.76 = 1,221.12/x
  3. Step 3: Cross multiply
    3,995.28x = 5,990.76 × 1,221.12
  4. Step 4: Simplify right side
    3,995.28x = 7,315,436.85
  5. Step 5: Solve for x
    x = 7,315,436.85/3,995.28
  6. Step 6: Final answer
    x = 1,831.02

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.