Home / 2,108.45-3,164.49-1,378.91

Finding the Fourth Proportional to 2,108.45, 3,164.49 and 1,378.91

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Solution

The fourth proportional to 2,108.45, 3,164.49 and 1,378.91 is: 2,069.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.45 : 3,164.49 = 1,378.91 : x
  2. Step 2: Convert to fraction form
    2,108.45/3,164.49 = 1,378.91/x
  3. Step 3: Cross multiply
    2,108.45x = 3,164.49 × 1,378.91
  4. Step 4: Simplify right side
    2,108.45x = 4,363,531.08
  5. Step 5: Solve for x
    x = 4,363,531.08/2,108.45
  6. Step 6: Final answer
    x = 2,069.55

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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.