Home / 3,178.26-4,385.13-1,919.04

Finding the Fourth Proportional to 3,178.26, 4,385.13 and 1,919.04

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Solution

The fourth proportional to 3,178.26, 4,385.13 and 1,919.04 is: 2,647.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.26 : 4,385.13 = 1,919.04 : x
  2. Step 2: Convert to fraction form
    3,178.26/4,385.13 = 1,919.04/x
  3. Step 3: Cross multiply
    3,178.26x = 4,385.13 × 1,919.04
  4. Step 4: Simplify right side
    3,178.26x = 8,415,239.88
  5. Step 5: Solve for x
    x = 8,415,239.88/3,178.26
  6. Step 6: Final answer
    x = 2,647.75

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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.