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Finding the Fourth Proportional to 664.70, 917.27 and 369.96

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Solution

The fourth proportional to 664.70, 917.27 and 369.96 is: 510.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.70 : 917.27 = 369.96 : x
  2. Step 2: Convert to fraction form
    664.70/917.27 = 369.96/x
  3. Step 3: Cross multiply
    664.70x = 917.27 × 369.96
  4. Step 4: Simplify right side
    664.70x = 339,353.21
  5. Step 5: Solve for x
    x = 339,353.21/664.70
  6. Step 6: Final answer
    x = 510.54

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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.