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Finding the Fourth Proportional to 1,067.87, 1,601.80 and 418.15

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Solution

The fourth proportional to 1,067.87, 1,601.80 and 418.15 is: 627.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.87 : 1,601.80 = 418.15 : x
  2. Step 2: Convert to fraction form
    1,067.87/1,601.80 = 418.15/x
  3. Step 3: Cross multiply
    1,067.87x = 1,601.80 × 418.15
  4. Step 4: Simplify right side
    1,067.87x = 669,782.57
  5. Step 5: Solve for x
    x = 669,782.57/1,067.87
  6. Step 6: Final answer
    x = 627.22

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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.