Home / 3,720.47-5,583.94-1,990.31

Finding the Fourth Proportional to 3,720.47, 5,583.94 and 1,990.31

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Solution

The fourth proportional to 3,720.47, 5,583.94 and 1,990.31 is: 2,987.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.47 : 5,583.94 = 1,990.31 : x
  2. Step 2: Convert to fraction form
    3,720.47/5,583.94 = 1,990.31/x
  3. Step 3: Cross multiply
    3,720.47x = 5,583.94 × 1,990.31
  4. Step 4: Simplify right side
    3,720.47x = 11,113,738.73
  5. Step 5: Solve for x
    x = 11,113,738.73/3,720.47
  6. Step 6: Final answer
    x = 2,987.19

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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.