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Finding the Fourth Proportional to 664.69, 917.25 and 369.97

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Solution

The fourth proportional to 664.69, 917.25 and 369.97 is: 510.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.69 : 917.25 = 369.97 : x
  2. Step 2: Convert to fraction form
    664.69/917.25 = 369.97/x
  3. Step 3: Cross multiply
    664.69x = 917.25 × 369.97
  4. Step 4: Simplify right side
    664.69x = 339,354.98
  5. Step 5: Solve for x
    x = 339,354.98/664.69
  6. Step 6: Final answer
    x = 510.55

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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.