Home / 3,120.68-4,681.20-1,172.72

Finding the Fourth Proportional to 3,120.68, 4,681.20 and 1,172.72

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Solution

The fourth proportional to 3,120.68, 4,681.20 and 1,172.72 is: 1,759.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.68 : 4,681.20 = 1,172.72 : x
  2. Step 2: Convert to fraction form
    3,120.68/4,681.20 = 1,172.72/x
  3. Step 3: Cross multiply
    3,120.68x = 4,681.20 × 1,172.72
  4. Step 4: Simplify right side
    3,120.68x = 5,489,736.86
  5. Step 5: Solve for x
    x = 5,489,736.86/3,120.68
  6. Step 6: Final answer
    x = 1,759.15

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.