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Finding the Fourth Proportional to 664.17, 996.27 and 339.28

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Solution

The fourth proportional to 664.17, 996.27 and 339.28 is: 508.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.17 : 996.27 = 339.28 : x
  2. Step 2: Convert to fraction form
    664.17/996.27 = 339.28/x
  3. Step 3: Cross multiply
    664.17x = 996.27 × 339.28
  4. Step 4: Simplify right side
    664.17x = 338,014.49
  5. Step 5: Solve for x
    x = 338,014.49/664.17
  6. Step 6: Final answer
    x = 508.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.