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Finding the Fourth Proportional to 1,194.45, 1,789.35 and 672.86

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Solution

The fourth proportional to 1,194.45, 1,789.35 and 672.86 is: 1,007.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,194.45 : 1,789.35 = 672.86 : x
  2. Step 2: Convert to fraction form
    1,194.45/1,789.35 = 672.86/x
  3. Step 3: Cross multiply
    1,194.45x = 1,789.35 × 672.86
  4. Step 4: Simplify right side
    1,194.45x = 1,203,982.04
  5. Step 5: Solve for x
    x = 1,203,982.04/1,194.45
  6. Step 6: Final answer
    x = 1,007.98

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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.