Home / 3,120.80-4,681.76-1,172.96

Finding the Fourth Proportional to 3,120.80, 4,681.76 and 1,172.96

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Solution

The fourth proportional to 3,120.80, 4,681.76 and 1,172.96 is: 1,759.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.80 : 4,681.76 = 1,172.96 : x
  2. Step 2: Convert to fraction form
    3,120.80/4,681.76 = 1,172.96/x
  3. Step 3: Cross multiply
    3,120.80x = 4,681.76 × 1,172.96
  4. Step 4: Simplify right side
    3,120.80x = 5,491,517.21
  5. Step 5: Solve for x
    x = 5,491,517.21/3,120.80
  6. Step 6: Final answer
    x = 1,759.65

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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.