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Finding the Fourth Proportional to 3,182.76, 4,392.20 and 1,940.76

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Solution

The fourth proportional to 3,182.76, 4,392.20 and 1,940.76 is: 2,678.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,182.76 : 4,392.20 = 1,940.76 : x
  2. Step 2: Convert to fraction form
    3,182.76/4,392.20 = 1,940.76/x
  3. Step 3: Cross multiply
    3,182.76x = 4,392.20 × 1,940.76
  4. Step 4: Simplify right side
    3,182.76x = 8,524,206.07
  5. Step 5: Solve for x
    x = 8,524,206.07/3,182.76
  6. Step 6: Final answer
    x = 2,678.24

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Half scale
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Double scale
Find fourth proportional to 3,183.76, 4,393.58 and 1,941.76
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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.