Home / 3,540.78-5,309.35-1,591.31

Finding the Fourth Proportional to 3,540.78, 5,309.35 and 1,591.31

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Solution

The fourth proportional to 3,540.78, 5,309.35 and 1,591.31 is: 2,386.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,540.78 : 5,309.35 = 1,591.31 : x
  2. Step 2: Convert to fraction form
    3,540.78/5,309.35 = 1,591.31/x
  3. Step 3: Cross multiply
    3,540.78x = 5,309.35 × 1,591.31
  4. Step 4: Simplify right side
    3,540.78x = 8,448,821.75
  5. Step 5: Solve for x
    x = 8,448,821.75/3,540.78
  6. Step 6: Final answer
    x = 2,386.15

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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.