Home / 3,991.60-5,987.40-1,218.29

Finding the Fourth Proportional to 3,991.60, 5,987.40 and 1,218.29

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Solution

The fourth proportional to 3,991.60, 5,987.40 and 1,218.29 is: 1,827.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.60 : 5,987.40 = 1,218.29 : x
  2. Step 2: Convert to fraction form
    3,991.60/5,987.40 = 1,218.29/x
  3. Step 3: Cross multiply
    3,991.60x = 5,987.40 × 1,218.29
  4. Step 4: Simplify right side
    3,991.60x = 7,294,356.56
  5. Step 5: Solve for x
    x = 7,294,356.56/3,991.60
  6. Step 6: Final answer
    x = 1,827.43

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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.