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Finding the Fourth Proportional to 3,078.75, 4,246.16 and 1,900.11

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Solution

The fourth proportional to 3,078.75, 4,246.16 and 1,900.11 is: 2,620.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.75 : 4,246.16 = 1,900.11 : x
  2. Step 2: Convert to fraction form
    3,078.75/4,246.16 = 1,900.11/x
  3. Step 3: Cross multiply
    3,078.75x = 4,246.16 × 1,900.11
  4. Step 4: Simplify right side
    3,078.75x = 8,068,161.58
  5. Step 5: Solve for x
    x = 8,068,161.58/3,078.75
  6. Step 6: Final answer
    x = 2,620.60

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Half scale
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Double scale
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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.