Home / 1,378.32-2,067.87-404.42

Finding the Fourth Proportional to 1,378.32, 2,067.87 and 404.42

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Solution

The fourth proportional to 1,378.32, 2,067.87 and 404.42 is: 606.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.32 : 2,067.87 = 404.42 : x
  2. Step 2: Convert to fraction form
    1,378.32/2,067.87 = 404.42/x
  3. Step 3: Cross multiply
    1,378.32x = 2,067.87 × 404.42
  4. Step 4: Simplify right side
    1,378.32x = 836,287.99
  5. Step 5: Solve for x
    x = 836,287.99/1,378.32
  6. Step 6: Final answer
    x = 606.74

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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.