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Finding the Fourth Proportional to 842.93, 1,163.41 and 488.91

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Solution

The fourth proportional to 842.93, 1,163.41 and 488.91 is: 674.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.93 : 1,163.41 = 488.91 : x
  2. Step 2: Convert to fraction form
    842.93/1,163.41 = 488.91/x
  3. Step 3: Cross multiply
    842.93x = 1,163.41 × 488.91
  4. Step 4: Simplify right side
    842.93x = 568,802.78
  5. Step 5: Solve for x
    x = 568,802.78/842.93
  6. Step 6: Final answer
    x = 674.79

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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.