Home / 3,172.30-4,759.42-1,418.78

Finding the Fourth Proportional to 3,172.30, 4,759.42 and 1,418.78

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Solution

The fourth proportional to 3,172.30, 4,759.42 and 1,418.78 is: 2,128.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172.30 : 4,759.42 = 1,418.78 : x
  2. Step 2: Convert to fraction form
    3,172.30/4,759.42 = 1,418.78/x
  3. Step 3: Cross multiply
    3,172.30x = 4,759.42 × 1,418.78
  4. Step 4: Simplify right side
    3,172.30x = 6,752,551.90
  5. Step 5: Solve for x
    x = 6,752,551.90/3,172.30
  6. Step 6: Final answer
    x = 2,128.60

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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.