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Finding the Fourth Proportional to 791.13, 1,185.13 and 746.17

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Solution

The fourth proportional to 791.13, 1,185.13 and 746.17 is: 1,117.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.13 : 1,185.13 = 746.17 : x
  2. Step 2: Convert to fraction form
    791.13/1,185.13 = 746.17/x
  3. Step 3: Cross multiply
    791.13x = 1,185.13 × 746.17
  4. Step 4: Simplify right side
    791.13x = 884,308.45
  5. Step 5: Solve for x
    x = 884,308.45/791.13
  6. Step 6: Final answer
    x = 1,117.78

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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.