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Finding the Fourth Proportional to 1,996.40, 2,993.84 and 609.31

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Solution

The fourth proportional to 1,996.40, 2,993.84 and 609.31 is: 913.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,996.40 : 2,993.84 = 609.31 : x
  2. Step 2: Convert to fraction form
    1,996.40/2,993.84 = 609.31/x
  3. Step 3: Cross multiply
    1,996.40x = 2,993.84 × 609.31
  4. Step 4: Simplify right side
    1,996.40x = 1,824,176.65
  5. Step 5: Solve for x
    x = 1,824,176.65/1,996.40
  6. Step 6: Final answer
    x = 913.73

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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.