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Finding the Fourth Proportional to 1,138.73, 1,716.62 and 1,063.49

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Solution

The fourth proportional to 1,138.73, 1,716.62 and 1,063.49 is: 1,603.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138.73 : 1,716.62 = 1,063.49 : x
  2. Step 2: Convert to fraction form
    1,138.73/1,716.62 = 1,063.49/x
  3. Step 3: Cross multiply
    1,138.73x = 1,716.62 × 1,063.49
  4. Step 4: Simplify right side
    1,138.73x = 1,825,594.30
  5. Step 5: Solve for x
    x = 1,825,594.30/1,138.73
  6. Step 6: Final answer
    x = 1,603.19

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.