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Finding the Fourth Proportional to 1,101.88, 1,651.67 and 371.21

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Solution

The fourth proportional to 1,101.88, 1,651.67 and 371.21 is: 556.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.88 : 1,651.67 = 371.21 : x
  2. Step 2: Convert to fraction form
    1,101.88/1,651.67 = 371.21/x
  3. Step 3: Cross multiply
    1,101.88x = 1,651.67 × 371.21
  4. Step 4: Simplify right side
    1,101.88x = 613,107.70
  5. Step 5: Solve for x
    x = 613,107.70/1,101.88
  6. Step 6: Final answer
    x = 556.42

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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.