Home / 3,680.32-5,078.64-2,108.20

Finding the Fourth Proportional to 3,680.32, 5,078.64 and 2,108.20

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Solution

The fourth proportional to 3,680.32, 5,078.64 and 2,108.20 is: 2,909.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,680.32 : 5,078.64 = 2,108.20 : x
  2. Step 2: Convert to fraction form
    3,680.32/5,078.64 = 2,108.20/x
  3. Step 3: Cross multiply
    3,680.32x = 5,078.64 × 2,108.20
  4. Step 4: Simplify right side
    3,680.32x = 10,706,788.85
  5. Step 5: Solve for x
    x = 10,706,788.85/3,680.32
  6. Step 6: Final answer
    x = 2,909.20

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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.