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Finding the Fourth Proportional to 1,338.39, 2,006.98 and 753.37

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Solution

The fourth proportional to 1,338.39, 2,006.98 and 753.37 is: 1,129.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338.39 : 2,006.98 = 753.37 : x
  2. Step 2: Convert to fraction form
    1,338.39/2,006.98 = 753.37/x
  3. Step 3: Cross multiply
    1,338.39x = 2,006.98 × 753.37
  4. Step 4: Simplify right side
    1,338.39x = 1,511,991.62
  5. Step 5: Solve for x
    x = 1,511,991.62/1,338.39
  6. Step 6: Final answer
    x = 1,129.71

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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.