Home / 1,378.10-2,067.46-441.05

Finding the Fourth Proportional to 1,378.10, 2,067.46 and 441.05

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Solution

The fourth proportional to 1,378.10, 2,067.46 and 441.05 is: 661.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.10 : 2,067.46 = 441.05 : x
  2. Step 2: Convert to fraction form
    1,378.10/2,067.46 = 441.05/x
  3. Step 3: Cross multiply
    1,378.10x = 2,067.46 × 441.05
  4. Step 4: Simplify right side
    1,378.10x = 911,841.79
  5. Step 5: Solve for x
    x = 911,841.79/1,378.10
  6. Step 6: Final answer
    x = 661.66

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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.