Home / 3,920.94-5,880.78-1,288.44

Finding the Fourth Proportional to 3,920.94, 5,880.78 and 1,288.44

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Solution

The fourth proportional to 3,920.94, 5,880.78 and 1,288.44 is: 1,932.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.94 : 5,880.78 = 1,288.44 : x
  2. Step 2: Convert to fraction form
    3,920.94/5,880.78 = 1,288.44/x
  3. Step 3: Cross multiply
    3,920.94x = 5,880.78 × 1,288.44
  4. Step 4: Simplify right side
    3,920.94x = 7,577,032.18
  5. Step 5: Solve for x
    x = 7,577,032.18/3,920.94
  6. Step 6: Final answer
    x = 1,932.45

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Similar ratio
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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.