Home / 3,872.39-5,342.66-2,278.52

Finding the Fourth Proportional to 3,872.39, 5,342.66 and 2,278.52

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Solution

The fourth proportional to 3,872.39, 5,342.66 and 2,278.52 is: 3,143.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,872.39 : 5,342.66 = 2,278.52 : x
  2. Step 2: Convert to fraction form
    3,872.39/5,342.66 = 2,278.52/x
  3. Step 3: Cross multiply
    3,872.39x = 5,342.66 × 2,278.52
  4. Step 4: Simplify right side
    3,872.39x = 12,173,319.56
  5. Step 5: Solve for x
    x = 12,173,319.56/3,872.39
  6. Step 6: Final answer
    x = 3,143.62

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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.