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Finding the Fourth Proportional to 792.07, 1,091.41 and 673.63

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Solution

The fourth proportional to 792.07, 1,091.41 and 673.63 is: 928.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.07 : 1,091.41 = 673.63 : x
  2. Step 2: Convert to fraction form
    792.07/1,091.41 = 673.63/x
  3. Step 3: Cross multiply
    792.07x = 1,091.41 × 673.63
  4. Step 4: Simplify right side
    792.07x = 735,206.52
  5. Step 5: Solve for x
    x = 735,206.52/792.07
  6. Step 6: Final answer
    x = 928.21

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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.