Home / 3,120.28-4,311.26-2,415

Finding the Fourth Proportional to 3,120.28, 4,311.26 and 2,415

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Solution

The fourth proportional to 3,120.28, 4,311.26 and 2,415 is: 3,336.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.28 : 4,311.26 = 2,415 : x
  2. Step 2: Convert to fraction form
    3,120.28/4,311.26 = 2,415/x
  3. Step 3: Cross multiply
    3,120.28x = 4,311.26 × 2,415
  4. Step 4: Simplify right side
    3,120.28x = 10,411,692.90
  5. Step 5: Solve for x
    x = 10,411,692.90/3,120.28
  6. Step 6: Final answer
    x = 3,336.78

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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.