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Finding the Fourth Proportional to 1,372.26, 1,894.13 and 1,187.73

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Solution

The fourth proportional to 1,372.26, 1,894.13 and 1,187.73 is: 1,639.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.26 : 1,894.13 = 1,187.73 : x
  2. Step 2: Convert to fraction form
    1,372.26/1,894.13 = 1,187.73/x
  3. Step 3: Cross multiply
    1,372.26x = 1,894.13 × 1,187.73
  4. Step 4: Simplify right side
    1,372.26x = 2,249,715.02
  5. Step 5: Solve for x
    x = 2,249,715.02/1,372.26
  6. Step 6: Final answer
    x = 1,639.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.