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Finding the Fourth Proportional to 1,338.34, 2,007.54 and 679.73

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Solution

The fourth proportional to 1,338.34, 2,007.54 and 679.73 is: 1,019.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338.34 : 2,007.54 = 679.73 : x
  2. Step 2: Convert to fraction form
    1,338.34/2,007.54 = 679.73/x
  3. Step 3: Cross multiply
    1,338.34x = 2,007.54 × 679.73
  4. Step 4: Simplify right side
    1,338.34x = 1,364,585.16
  5. Step 5: Solve for x
    x = 1,364,585.16/1,338.34
  6. Step 6: Final answer
    x = 1,019.61

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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.