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Finding the Fourth Proportional to 1,260.91, 1,891.30 and 383.37

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Solution

The fourth proportional to 1,260.91, 1,891.30 and 383.37 is: 575.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.91 : 1,891.30 = 383.37 : x
  2. Step 2: Convert to fraction form
    1,260.91/1,891.30 = 383.37/x
  3. Step 3: Cross multiply
    1,260.91x = 1,891.30 × 383.37
  4. Step 4: Simplify right side
    1,260.91x = 725,067.68
  5. Step 5: Solve for x
    x = 725,067.68/1,260.91
  6. Step 6: Final answer
    x = 575.04

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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.