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Finding the Fourth Proportional to 2,797.57, 4,196.90 and 949

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Solution

The fourth proportional to 2,797.57, 4,196.90 and 949 is: 1,423.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,797.57 : 4,196.90 = 949 : x
  2. Step 2: Convert to fraction form
    2,797.57/4,196.90 = 949/x
  3. Step 3: Cross multiply
    2,797.57x = 4,196.90 × 949
  4. Step 4: Simplify right side
    2,797.57x = 3,982,853.36
  5. Step 5: Solve for x
    x = 3,982,853.36/2,797.57
  6. Step 6: Final answer
    x = 1,423.68

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Double scale
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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.