Home / 2,378.40-3,278.26-1,787.91

Finding the Fourth Proportional to 2,378.40, 3,278.26 and 1,787.91

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Solution

The fourth proportional to 2,378.40, 3,278.26 and 1,787.91 is: 2,464.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,378.40 : 3,278.26 = 1,787.91 : x
  2. Step 2: Convert to fraction form
    2,378.40/3,278.26 = 1,787.91/x
  3. Step 3: Cross multiply
    2,378.40x = 3,278.26 × 1,787.91
  4. Step 4: Simplify right side
    2,378.40x = 5,861,229.37
  5. Step 5: Solve for x
    x = 5,861,229.37/2,378.40
  6. Step 6: Final answer
    x = 2,464.36

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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.