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Finding the Fourth Proportional to 664.69, 913.30 and 622.03

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Solution

The fourth proportional to 664.69, 913.30 and 622.03 is: 854.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.69 : 913.30 = 622.03 : x
  2. Step 2: Convert to fraction form
    664.69/913.30 = 622.03/x
  3. Step 3: Cross multiply
    664.69x = 913.30 × 622.03
  4. Step 4: Simplify right side
    664.69x = 568,100.00
  5. Step 5: Solve for x
    x = 568,100.00/664.69
  6. Step 6: Final answer
    x = 854.68

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.