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Finding the Fourth Proportional to 2,183.56, 3,275.34 and 722.80

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Solution

The fourth proportional to 2,183.56, 3,275.34 and 722.80 is: 1,084.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,183.56 : 3,275.34 = 722.80 : x
  2. Step 2: Convert to fraction form
    2,183.56/3,275.34 = 722.80/x
  3. Step 3: Cross multiply
    2,183.56x = 3,275.34 × 722.80
  4. Step 4: Simplify right side
    2,183.56x = 2,367,415.75
  5. Step 5: Solve for x
    x = 2,367,415.75/2,183.56
  6. Step 6: Final answer
    x = 1,084.20

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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.