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Finding the Fourth Proportional to 3,099.93, 4,276.31 and 1,979.69

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Solution

The fourth proportional to 3,099.93, 4,276.31 and 1,979.69 is: 2,730.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,099.93 : 4,276.31 = 1,979.69 : x
  2. Step 2: Convert to fraction form
    3,099.93/4,276.31 = 1,979.69/x
  3. Step 3: Cross multiply
    3,099.93x = 4,276.31 × 1,979.69
  4. Step 4: Simplify right side
    3,099.93x = 8,465,768.14
  5. Step 5: Solve for x
    x = 8,465,768.14/3,099.93
  6. Step 6: Final answer
    x = 2,730.95

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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.