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Finding the Fourth Proportional to 800.73, 1,104.30 and 613.89

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Solution

The fourth proportional to 800.73, 1,104.30 and 613.89 is: 846.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.73 : 1,104.30 = 613.89 : x
  2. Step 2: Convert to fraction form
    800.73/1,104.30 = 613.89/x
  3. Step 3: Cross multiply
    800.73x = 1,104.30 × 613.89
  4. Step 4: Simplify right side
    800.73x = 677,918.73
  5. Step 5: Solve for x
    x = 677,918.73/800.73
  6. Step 6: Final answer
    x = 846.63

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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.