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Finding the Fourth Proportional to 1,004.07, 1,383.96 and 672.39

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Solution

The fourth proportional to 1,004.07, 1,383.96 and 672.39 is: 926.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.07 : 1,383.96 = 672.39 : x
  2. Step 2: Convert to fraction form
    1,004.07/1,383.96 = 672.39/x
  3. Step 3: Cross multiply
    1,004.07x = 1,383.96 × 672.39
  4. Step 4: Simplify right side
    1,004.07x = 930,560.86
  5. Step 5: Solve for x
    x = 930,560.86/1,004.07
  6. Step 6: Final answer
    x = 926.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.