Home / 3,120.44-4,681.14-1,172.78

Finding the Fourth Proportional to 3,120.44, 4,681.14 and 1,172.78

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Solution

The fourth proportional to 3,120.44, 4,681.14 and 1,172.78 is: 1,759.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.44 : 4,681.14 = 1,172.78 : x
  2. Step 2: Convert to fraction form
    3,120.44/4,681.14 = 1,172.78/x
  3. Step 3: Cross multiply
    3,120.44x = 4,681.14 × 1,172.78
  4. Step 4: Simplify right side
    3,120.44x = 5,489,947.37
  5. Step 5: Solve for x
    x = 5,489,947.37/3,120.44
  6. Step 6: Final answer
    x = 1,759.35

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1.5x scale

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.