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Finding the Fourth Proportional to 1,338.12, 1,998.09 and 1,150.92

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Solution

The fourth proportional to 1,338.12, 1,998.09 and 1,150.92 is: 1,718.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338.12 : 1,998.09 = 1,150.92 : x
  2. Step 2: Convert to fraction form
    1,338.12/1,998.09 = 1,150.92/x
  3. Step 3: Cross multiply
    1,338.12x = 1,998.09 × 1,150.92
  4. Step 4: Simplify right side
    1,338.12x = 2,299,641.74
  5. Step 5: Solve for x
    x = 2,299,641.74/1,338.12
  6. Step 6: Final answer
    x = 1,718.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.