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Finding the Fourth Proportional to 794.45, 1,192.70 and 611.97

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Solution

The fourth proportional to 794.45, 1,192.70 and 611.97 is: 918.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.45 : 1,192.70 = 611.97 : x
  2. Step 2: Convert to fraction form
    794.45/1,192.70 = 611.97/x
  3. Step 3: Cross multiply
    794.45x = 1,192.70 × 611.97
  4. Step 4: Simplify right side
    794.45x = 729,896.62
  5. Step 5: Solve for x
    x = 729,896.62/794.45
  6. Step 6: Final answer
    x = 918.74

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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.