Home / 2,766.25-4,147.40-1,121.45

Finding the Fourth Proportional to 2,766.25, 4,147.40 and 1,121.45

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Solution

The fourth proportional to 2,766.25, 4,147.40 and 1,121.45 is: 1,681.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,766.25 : 4,147.40 = 1,121.45 : x
  2. Step 2: Convert to fraction form
    2,766.25/4,147.40 = 1,121.45/x
  3. Step 3: Cross multiply
    2,766.25x = 4,147.40 × 1,121.45
  4. Step 4: Simplify right side
    2,766.25x = 4,651,083.80
  5. Step 5: Solve for x
    x = 4,651,083.80/2,766.25
  6. Step 6: Final answer
    x = 1,681.37

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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.