Home / 1,378.23-2,067.08-404.21

Finding the Fourth Proportional to 1,378.23, 2,067.08 and 404.21

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Solution

The fourth proportional to 1,378.23, 2,067.08 and 404.21 is: 606.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.23 : 2,067.08 = 404.21 : x
  2. Step 2: Convert to fraction form
    1,378.23/2,067.08 = 404.21/x
  3. Step 3: Cross multiply
    1,378.23x = 2,067.08 × 404.21
  4. Step 4: Simplify right side
    1,378.23x = 835,522.05
  5. Step 5: Solve for x
    x = 835,522.05/1,378.23
  6. Step 6: Final answer
    x = 606.23

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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.