Home / 1,378.20-2,066.82-404.04

Finding the Fourth Proportional to 1,378.20, 2,066.82 and 404.04

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Solution

The fourth proportional to 1,378.20, 2,066.82 and 404.04 is: 605.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.20 : 2,066.82 = 404.04 : x
  2. Step 2: Convert to fraction form
    1,378.20/2,066.82 = 404.04/x
  3. Step 3: Cross multiply
    1,378.20x = 2,066.82 × 404.04
  4. Step 4: Simplify right side
    1,378.20x = 835,077.95
  5. Step 5: Solve for x
    x = 835,077.95/1,378.20
  6. Step 6: Final answer
    x = 605.92

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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.