Home / 3,969.20-5,477.49-2,290.55

Finding the Fourth Proportional to 3,969.20, 5,477.49 and 2,290.55

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Solution

The fourth proportional to 3,969.20, 5,477.49 and 2,290.55 is: 3,160.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969.20 : 5,477.49 = 2,290.55 : x
  2. Step 2: Convert to fraction form
    3,969.20/5,477.49 = 2,290.55/x
  3. Step 3: Cross multiply
    3,969.20x = 5,477.49 × 2,290.55
  4. Step 4: Simplify right side
    3,969.20x = 12,546,437.33
  5. Step 5: Solve for x
    x = 12,546,437.33/3,969.20
  6. Step 6: Final answer
    x = 3,160.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.