Home / 2,912.40-4,368.72-1,180.80

Finding the Fourth Proportional to 2,912.40, 4,368.72 and 1,180.80

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Solution

The fourth proportional to 2,912.40, 4,368.72 and 1,180.80 is: 1,771.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,912.40 : 4,368.72 = 1,180.80 : x
  2. Step 2: Convert to fraction form
    2,912.40/4,368.72 = 1,180.80/x
  3. Step 3: Cross multiply
    2,912.40x = 4,368.72 × 1,180.80
  4. Step 4: Simplify right side
    2,912.40x = 5,158,584.58
  5. Step 5: Solve for x
    x = 5,158,584.58/2,912.40
  6. Step 6: Final answer
    x = 1,771.25

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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.