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Finding the Fourth Proportional to 2,195.70, 3,293.70 and 694.60

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Solution

The fourth proportional to 2,195.70, 3,293.70 and 694.60 is: 1,041.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,195.70 : 3,293.70 = 694.60 : x
  2. Step 2: Convert to fraction form
    2,195.70/3,293.70 = 694.60/x
  3. Step 3: Cross multiply
    2,195.70x = 3,293.70 × 694.60
  4. Step 4: Simplify right side
    2,195.70x = 2,287,804.02
  5. Step 5: Solve for x
    x = 2,287,804.02/2,195.70
  6. Step 6: Final answer
    x = 1,041.95

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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.