Home / 1,378.45-2,067.72-404.47

Finding the Fourth Proportional to 1,378.45, 2,067.72 and 404.47

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Solution

The fourth proportional to 1,378.45, 2,067.72 and 404.47 is: 606.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.45 : 2,067.72 = 404.47 : x
  2. Step 2: Convert to fraction form
    1,378.45/2,067.72 = 404.47/x
  3. Step 3: Cross multiply
    1,378.45x = 2,067.72 × 404.47
  4. Step 4: Simplify right side
    1,378.45x = 836,330.71
  5. Step 5: Solve for x
    x = 836,330.71/1,378.45
  6. Step 6: Final answer
    x = 606.72

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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.