Home / 3,218.75-4,825.40-1,371.15

Finding the Fourth Proportional to 3,218.75, 4,825.40 and 1,371.15

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Solution

The fourth proportional to 3,218.75, 4,825.40 and 1,371.15 is: 2,055.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218.75 : 4,825.40 = 1,371.15 : x
  2. Step 2: Convert to fraction form
    3,218.75/4,825.40 = 1,371.15/x
  3. Step 3: Cross multiply
    3,218.75x = 4,825.40 × 1,371.15
  4. Step 4: Simplify right side
    3,218.75x = 6,616,340.35
  5. Step 5: Solve for x
    x = 6,616,340.35/3,218.75
  6. Step 6: Final answer
    x = 2,055.57

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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.