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Finding the Fourth Proportional to 793.51, 1,092.45 and 689.95

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Solution

The fourth proportional to 793.51, 1,092.45 and 689.95 is: 949.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.51 : 1,092.45 = 689.95 : x
  2. Step 2: Convert to fraction form
    793.51/1,092.45 = 689.95/x
  3. Step 3: Cross multiply
    793.51x = 1,092.45 × 689.95
  4. Step 4: Simplify right side
    793.51x = 753,735.88
  5. Step 5: Solve for x
    x = 753,735.88/793.51
  6. Step 6: Final answer
    x = 949.88

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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.