Home / 1,378.16-2,067.33-404.28

Finding the Fourth Proportional to 1,378.16, 2,067.33 and 404.28

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Solution

The fourth proportional to 1,378.16, 2,067.33 and 404.28 is: 606.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.16 : 2,067.33 = 404.28 : x
  2. Step 2: Convert to fraction form
    1,378.16/2,067.33 = 404.28/x
  3. Step 3: Cross multiply
    1,378.16x = 2,067.33 × 404.28
  4. Step 4: Simplify right side
    1,378.16x = 835,780.17
  5. Step 5: Solve for x
    x = 835,780.17/1,378.16
  6. Step 6: Final answer
    x = 606.45

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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.