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Finding the Fourth Proportional to 664.50, 998.07 and 401.49

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Solution

The fourth proportional to 664.50, 998.07 and 401.49 is: 603.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.50 : 998.07 = 401.49 : x
  2. Step 2: Convert to fraction form
    664.50/998.07 = 401.49/x
  3. Step 3: Cross multiply
    664.50x = 998.07 × 401.49
  4. Step 4: Simplify right side
    664.50x = 400,715.88
  5. Step 5: Solve for x
    x = 400,715.88/664.50
  6. Step 6: Final answer
    x = 603.03

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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.