Home / 1,378.25-2,067.40-404.35

Finding the Fourth Proportional to 1,378.25, 2,067.40 and 404.35

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Solution

The fourth proportional to 1,378.25, 2,067.40 and 404.35 is: 606.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.25 : 2,067.40 = 404.35 : x
  2. Step 2: Convert to fraction form
    1,378.25/2,067.40 = 404.35/x
  3. Step 3: Cross multiply
    1,378.25x = 2,067.40 × 404.35
  4. Step 4: Simplify right side
    1,378.25x = 835,947.01
  5. Step 5: Solve for x
    x = 835,947.01/1,378.25
  6. Step 6: Final answer
    x = 606.53

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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.