Home / 2,375.78-3,278.56-1,381.64

Finding the Fourth Proportional to 2,375.78, 3,278.56 and 1,381.64

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Solution

The fourth proportional to 2,375.78, 3,278.56 and 1,381.64 is: 1,906.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,375.78 : 3,278.56 = 1,381.64 : x
  2. Step 2: Convert to fraction form
    2,375.78/3,278.56 = 1,381.64/x
  3. Step 3: Cross multiply
    2,375.78x = 3,278.56 × 1,381.64
  4. Step 4: Simplify right side
    2,375.78x = 4,529,789.64
  5. Step 5: Solve for x
    x = 4,529,789.64/2,375.78
  6. Step 6: Final answer
    x = 1,906.65

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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.