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Finding the Fourth Proportional to 664.26, 916.68 and 365.50

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Solution

The fourth proportional to 664.26, 916.68 and 365.50 is: 504.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.26 : 916.68 = 365.50 : x
  2. Step 2: Convert to fraction form
    664.26/916.68 = 365.50/x
  3. Step 3: Cross multiply
    664.26x = 916.68 × 365.50
  4. Step 4: Simplify right side
    664.26x = 335,046.54
  5. Step 5: Solve for x
    x = 335,046.54/664.26
  6. Step 6: Final answer
    x = 504.39

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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.